840652866 has 12 divisors (see below), whose sum is σ = 1821414582. Its totient is φ = 280217616.

The previous prime is 840652849. The next prime is 840652919. The reversal of 840652866 is 668256048.

It can be written as a sum of positive squares in only one way, i.e., 839318841 + 1334025 = 28971^2 + 1155^2 .

It is a super-2 number, since 2×840652866² = 1413394482228027912, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23351451 + ... + 23351486.

Almost surely, 2^840652866 is an apocalyptic number.

840652866 is an abundant number, since it is smaller than the sum of its proper divisors (980761716).

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

840652866 is a wasteful number, since it uses less digits than its factorization.

840652866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46702945 (or 46702942 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The square root of 840652866 is about 28994.0143133027. The cubic root of 840652866 is about 943.7831789514.

The spelling of 840652866 in words is "eight hundred forty million, six hundred fifty-two thousand, eight hundred sixty-six".