861959376 has 30 divisors (see below), whose sum is σ = 2412289490. Its totient is φ = 287319744.

The previous prime is 861959369. The next prime is 861959429. The reversal of 861959376 is 673959168.

861959376 is a `hidden beast` number, since 86 + 195 + 9 + 376 = 666.

It can be written as a sum of positive squares in only one way, i.e., 830822976 + 31136400 = 28824^2 + 5580^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2992771 + ... + 2993058.

Almost surely, 2^861959376 is an apocalyptic number.

It is an amenable number.

861959376 is an abundant number, since it is smaller than the sum of its proper divisors (1550330114).

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

861959376 is a wasteful number, since it uses less digits than its factorization.

861959376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5985843 (or 5985834 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 54.

The square root of 861959376 is about 29359.1446741897. The cubic root of 861959376 is about 951.6902047328.

The spelling of 861959376 in words is "eight hundred sixty-one million, nine hundred fifty-nine thousand, three hundred seventy-six".