865077408 has 120 divisors (see below), whose sum is σ = 2739980628. Its totient is φ = 266167296.

The previous prime is 865077407. The next prime is 865077439. The reversal of 865077408 is 804770568.

It can be written as a sum of positive squares in 2 ways, for example, as 865065744 + 11664 = 29412^2 + 108^2 .

It is not an unprimeable number, because it can be changed into a prime (865077407) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 20860 + ... + 46532.

Almost surely, 2^865077408 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 865077408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1369990314).

865077408 is an abundant number, since it is smaller than the sum of its proper divisors (1874903220).

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

865077408 is a wasteful number, since it uses less digits than its factorization.

865077408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25708 (or 25691 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The square root of 865077408 is about 29412.1982857453. The cubic root of 865077408 is about 952.8363645557.

The spelling of 865077408 in words is "eight hundred sixty-five million, seventy-seven thousand, four hundred eight".