865088140 has 72 divisors (see below), whose sum is σ = 2143223712. Its totient is φ = 292400640.

The previous prime is 865088123. The next prime is 865088171. The reversal of 865088140 is 41880568.

It is a junction number, because it is equal to n+sod(n) for n = 865088093 and 865088102.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63364 + ... + 75796.

It is an arithmetic number, because the mean of its divisors is an integer number (29766996).

Almost surely, 2^865088140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 865088140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1071611856).

865088140 is an abundant number, since it is smaller than the sum of its proper divisors (1278135572).

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

865088140 is a wasteful number, since it uses less digits than its factorization.

865088140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12527 (or 12518 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 40.

The square root of 865088140 is about 29412.3807264900. The cubic root of 865088140 is about 952.8403047802.

The spelling of 865088140 in words is "eight hundred sixty-five million, eighty-eight thousand, one hundred forty".