861803672 has 64 divisors (see below), whose sum is σ = 1770444000. Its totient is φ = 391716864.

The previous prime is 861803603. The next prime is 861803687. The reversal of 861803672 is 276308168.

It is a happy number.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 850238 + ... + 851250.

Almost surely, 2^861803672 is an apocalyptic number.

It is an amenable number.

861803672 is an abundant number, since it is smaller than the sum of its proper divisors (908640328).

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

861803672 is a wasteful number, since it uses less digits than its factorization.

861803672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1260 (or 1256 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 861803672 is about 29356.4928422998. The cubic root of 861803672 is about 951.6328969682.

The spelling of 861803672 in words is "eight hundred sixty-one million, eight hundred three thousand, six hundred seventy-two".