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57740431 = 713760209
BaseRepresentation
bin1101110001000…
…0110010001111
311000122111222111
43130100302033
5104240143211
65421324451
71300533310
oct334206217
9130574874
1057740431
112a658271
1217406727
13bc68648
147950607
155108421
hex3710c8f

57740431 has 8 divisors (see below), whose sum is σ = 66471840. Its totient is φ = 49129728.

The previous prime is 57740407. The next prime is 57740489. The reversal of 57740431 is 13404775.

57740431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 57740431 - 29 = 57739919 is a prime.

It is a super-2 number, since 2×577404312 = 6667914744131522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 57740393 and 57740402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57740491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29146 + ... + 31063.

It is an arithmetic number, because the mean of its divisors is an integer number (8308980).

Almost surely, 257740431 is an apocalyptic number.

57740431 is a deficient number, since it is larger than the sum of its proper divisors (8731409).

57740431 is a wasteful number, since it uses less digits than its factorization.

57740431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60353.

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 57740431 is about 7598.7124567258. The cubic root of 57740431 is about 386.5093524578.

The spelling of 57740431 in words is "fifty-seven million, seven hundred forty thousand, four hundred thirty-one".

Divisors: 1 7 137 959 60209 421463 8248633 57740431