861059904 has 28 divisors (see below), whose sum is σ = 2278221504. Its totient is φ = 287019904.

The previous prime is 861059869. The next prime is 861059921. The reversal of 861059904 is 409950168.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2242152 + ... + 2242535.

Almost surely, 2^861059904 is an apocalyptic number.

It is an amenable number.

861059904 is an abundant number, since it is smaller than the sum of its proper divisors (1417161600).

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

861059904 is a wasteful number, since it uses less digits than its factorization.

861059904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4484702 (or 4484692 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 861059904 is about 29343.8222459175. The cubic root of 861059904 is about 951.3590535417.

The spelling of 861059904 in words is "eight hundred sixty-one million, fifty-nine thousand, nine hundred four".