865670040 has 96 divisors (see below), whose sum is σ = 2904220800. Its totient is φ = 223395840.

The previous prime is 865670011. The next prime is 865670053. The reversal of 865670040 is 40076568.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 865669977 and 865670004.

It is a congruent number.

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, 27625 + ... + 49944.

It is an arithmetic number, because the mean of its divisors is an integer number (30252300).

Almost surely, 2^865670040 is an apocalyptic number.

It is an amenable number.

865670040 is an abundant number, since it is smaller than the sum of its proper divisors (2038550760).

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

865670040 is a wasteful number, since it uses less digits than its factorization.

865670040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77617 (or 77610 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 865670040 is about 29422.2711563876. The cubic root of 865670040 is about 953.0538990086.

The spelling of 865670040 in words is "eight hundred sixty-five million, six hundred seventy thousand, forty".