865387404 has 72 divisors (see below), whose sum is σ = 2502732960. Its totient is φ = 246984192.

The previous prime is 865387331. The next prime is 865387417. The reversal of 865387404 is 404783568.

It is a self number, because there is not a number n which added to its sum of digits gives 865387404.

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, 405412 + ... + 407540.

It is an arithmetic number, because the mean of its divisors is an integer number (34760180).

Almost surely, 2^865387404 is an apocalyptic number.

865387404 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

865387404 is an abundant number, since it is smaller than the sum of its proper divisors (1637345556).

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

865387404 is a wasteful number, since it uses less digits than its factorization.

865387404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3759 (or 3754 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The square root of 865387404 is about 29417.4676680370. The cubic root of 865387404 is about 952.9501656190.

The spelling of 865387404 in words is "eight hundred sixty-five million, three hundred eighty-seven thousand, four hundred four".