861001952 has 24 divisors (see below), whose sum is σ = 1697711400. Its totient is φ = 429837184.

The previous prime is 861001949. The next prime is 861001963. The reversal of 861001952 is 259100168.

It is a super-2 number, since 2×861001952² = 1482648722695620608, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

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, 674 + ... + 41502.

It is an arithmetic number, because the mean of its divisors is an integer number (70737975).

Almost surely, 2^861001952 is an apocalyptic number.

It is an amenable number.

861001952 is a deficient number, since it is larger than the sum of its proper divisors (836709448).

861001952 is a wasteful number, since it uses less digits than its factorization.

861001952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41498 (or 41490 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 861001952 is about 29342.8347642146. The cubic root of 861001952 is about 951.3377099253.

The spelling of 861001952 in words is "eight hundred sixty-one million, one thousand, nine hundred fifty-two".