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57472870 = 25713137461
BaseRepresentation
bin1101101100111…
…1011101100110
311000010220221211
43123033131212
5104203112440
65411502034
71265340250
oct333173546
9130126854
1057472870
112a495244
12172b791a
13bba3920
1478c0cd0
1550a3eea
hex36cf766

57472870 has 64 divisors (see below), whose sum is σ = 128532096. Its totient is φ = 18017280.

The previous prime is 57472861. The next prime is 57472871. The reversal of 57472870 is 7827475.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57472871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 124440 + ... + 124900.

It is an arithmetic number, because the mean of its divisors is an integer number (2008314).

Almost surely, 257472870 is an apocalyptic number.

57472870 is the 4795-th heptagonal number.

57472870 is an abundant number, since it is smaller than the sum of its proper divisors (71059226).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

57472870 is a wasteful number, since it uses less digits than its factorization.

57472870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625.

The product of its (nonzero) digits is 109760, while the sum is 40.

The square root of 57472870 is about 7581.0863337651. The cubic root of 57472870 is about 385.9114180115.

The spelling of 57472870 in words is "fifty-seven million, four hundred seventy-two thousand, eight hundred seventy".

Divisors: 1 2 5 7 10 13 14 26 35 65 70 91 130 137 182 274 455 461 685 910 922 959 1370 1781 1918 2305 3227 3562 4610 4795 5993 6454 8905 9590 11986 12467 16135 17810 24934 29965 32270 41951 59930 62335 63157 83902 124670 126314 209755 315785 419510 442099 631570 821041 884198 1642082 2210495 4105205 4420990 5747287 8210410 11494574 28736435 57472870