865679040 has 84 divisors (see below), whose sum is σ = 2977585104. Its totient is φ = 230846976.

The previous prime is 865679027. The next prime is 865679063. The reversal of 865679040 is 40976568.

865679040 is a `hidden beast` number, since 86 + 567 + 9 + 0 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 147412 + ... + 153171.

Almost surely, 2^865679040 is an apocalyptic number.

865679040 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

865679040 is an abundant number, since it is smaller than the sum of its proper divisors (2111906064).

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

865679040 is a wasteful number, since it uses less digits than its factorization.

865679040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300606 (or 300593 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 865679040 is about 29422.4241013551. The cubic root of 865679040 is about 953.0572018280.

The spelling of 865679040 in words is "eight hundred sixty-five million, six hundred seventy-nine thousand, forty".