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57880038 = 2331311183
BaseRepresentation
bin1101110011001…
…0110111100110
311000220121111010
43130302313212
5104304130123
65424323050
71301654316
oct334626746
9130817433
1057880038
112a743147
1217473486
13bcb7058
147989446
155134993
hex3732de6

57880038 has 16 divisors (see below), whose sum is σ = 119494656. Its totient is φ = 18670920.

The previous prime is 57880037. The next prime is 57880049. The reversal of 57880038 is 83008875.

It is a junction number, because it is equal to n+sod(n) for n = 57879978 and 57880005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57880037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155406 + ... + 155777.

It is an arithmetic number, because the mean of its divisors is an integer number (7468416).

Almost surely, 257880038 is an apocalyptic number.

57880038 is an abundant number, since it is smaller than the sum of its proper divisors (61614618).

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

57880038 is a wasteful number, since it uses less digits than its factorization.

57880038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311219.

The product of its (nonzero) digits is 53760, while the sum is 39.

The square root of 57880038 is about 7607.8931380508. The cubic root of 57880038 is about 386.8206073861.

The spelling of 57880038 in words is "fifty-seven million, eight hundred eighty thousand, thirty-eight".

Divisors: 1 2 3 6 31 62 93 186 311183 622366 933549 1867098 9646673 19293346 28940019 57880038