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57808780 = 2252890439
BaseRepresentation
bin1101110010000…
…1011110001100
311000202222201221
43130201132030
5104244340110
65423013124
71301236501
oct334413614
9130688657
1057808780
112a6a4657
121743a1a4
13bc907a3
14796b4a8
15511d7da
hex372178c

57808780 has 12 divisors (see below), whose sum is σ = 121398480. Its totient is φ = 23123504.

The previous prime is 57808747. The next prime is 57808781. The reversal of 57808780 is 8780875.

57808780 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (57808781) 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 3 ways as a sum of consecutive naturals, for example, 1445200 + ... + 1445239.

It is an arithmetic number, because the mean of its divisors is an integer number (10116540).

Almost surely, 257808780 is an apocalyptic number.

It is an amenable number.

57808780 is an abundant number, since it is smaller than the sum of its proper divisors (63589700).

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

57808780 is a wasteful number, since it uses less digits than its factorization.

57808780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2890448 (or 2890446 counting only the distinct ones).

The product of its (nonzero) digits is 125440, while the sum is 43.

The square root of 57808780 is about 7603.2085332444. The cubic root of 57808780 is about 386.6617997141.

The spelling of 57808780 in words is "fifty-seven million, eight hundred eight thousand, seven hundred eighty".

Divisors: 1 2 4 5 10 20 2890439 5780878 11561756 14452195 28904390 57808780