Search a number
-
+
57872087 = 7213471933
BaseRepresentation
bin1101110011000…
…0111011010111
311000220012120122
43130300323113
5104303401322
65424222155
71301622200
oct334607327
9130805518
1057872087
112a738179
121746a95b
13bcb3550
1479865a7
155132442
hex3730ed7

57872087 has 24 divisors (see below), whose sum is σ = 74079936. Its totient is φ = 44791488.

The previous prime is 57872083. The next prime is 57872123. The reversal of 57872087 is 78027875.

It is not a de Polignac number, because 57872087 - 22 = 57872083 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57872083) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28973 + ... + 30905.

It is an arithmetic number, because the mean of its divisors is an integer number (3086664).

Almost surely, 257872087 is an apocalyptic number.

57872087 is a deficient number, since it is larger than the sum of its proper divisors (16207849).

57872087 is a wasteful number, since it uses less digits than its factorization.

57872087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2007 (or 2000 counting only the distinct ones).

The product of its (nonzero) digits is 219520, while the sum is 44.

The square root of 57872087 is about 7607.3705707031. The cubic root of 57872087 is about 386.8028940166.

The spelling of 57872087 in words is "fifty-seven million, eight hundred seventy-two thousand, eighty-seven".

Divisors: 1 7 13 47 49 91 329 611 637 1933 2303 4277 13531 25129 29939 90851 94717 175903 635957 1181063 1231321 4451699 8267441 57872087