86857215740 has 48 divisors (see below), whose sum is σ = 183475152000. Its totient is φ = 34538668032.

The previous prime is 86857215737. The next prime is 86857215769. The reversal of 86857215740 is 4751275868.

It is a super-2 number, since 2×86857215740² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2599661 + ... + 2632859.

It is an arithmetic number, because the mean of its divisors is an integer number (3822399000).

Almost surely, 2^86857215740 is an apocalyptic number.

It is an amenable number.

86857215740 is an abundant number, since it is smaller than the sum of its proper divisors (96617936260).

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

86857215740 is a wasteful number, since it uses less digits than its factorization.

86857215740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33974 (or 33972 counting only the distinct ones).

The product of its (nonzero) digits is 3763200, while the sum is 53.

The spelling of 86857215740 in words is "eighty-six billion, eight hundred fifty-seven million, two hundred fifteen thousand, seven hundred forty".