861364250 has 32 divisors (see below), whose sum is σ = 1630633680. Its totient is φ = 340665600.

The previous prime is 861364241. The next prime is 861364267. The reversal of 861364250 is 52463168.

It can be written as a sum of positive squares in 8 ways, for example, as 29560969 + 831803281 = 5437^2 + 28841^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 861364250.

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, 2894 + ... + 41606.

Almost surely, 2^861364250 is an apocalyptic number.

861364250 is a deficient number, since it is larger than the sum of its proper divisors (769269430).

861364250 is a wasteful number, since it uses less digits than its factorization.

861364250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38819 (or 38809 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 861364250 is about 29349.0076493227. The cubic root of 861364250 is about 951.4711279028.

The spelling of 861364250 in words is "eight hundred sixty-one million, three hundred sixty-four thousand, two hundred fifty".