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57868590 = 23513148381
BaseRepresentation
bin1101110011000…
…0000100101110
311000220000210010
43130300010232
5104303243330
65424154050
71301606043
oct334600456
9130800703
1057868590
112a73558a
1217468926
13bcb1a90
1479851ca
1551313b0
hex373012e

57868590 has 32 divisors (see below), whose sum is σ = 149569056. Its totient is φ = 14244480.

The previous prime is 57868571. The next prime is 57868597. The reversal of 57868590 is 9586875.

It is a super-3 number, since 3×578685903 (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57868597) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73801 + ... + 74580.

It is an arithmetic number, because the mean of its divisors is an integer number (4674033).

Almost surely, 257868590 is an apocalyptic number.

57868590 is an abundant number, since it is smaller than the sum of its proper divisors (91700466).

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

57868590 is a wasteful number, since it uses less digits than its factorization.

57868590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148404.

The product of its (nonzero) digits is 604800, while the sum is 48.

The square root of 57868590 is about 7607.1407243458. The cubic root of 57868590 is about 386.7951028284.

The spelling of 57868590 in words is "fifty-seven million, eight hundred sixty-eight thousand, five hundred ninety".

Divisors: 1 2 3 5 6 10 13 15 26 30 39 65 78 130 195 390 148381 296762 445143 741905 890286 1483810 1928953 2225715 3857906 4451430 5786859 9644765 11573718 19289530 28934295 57868590