866131404 has 24 divisors (see below), whose sum is σ = 2022026160. Its totient is φ = 288560064.

The previous prime is 866131393. The next prime is 866131411. The reversal of 866131404 is 404131668.

It is a super-2 number, since 2×866131404² = 1500367217990022432, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6562 + ... + 42134.

It is an arithmetic number, because the mean of its divisors is an integer number (84251090).

Almost surely, 2^866131404 is an apocalyptic number.

It is an amenable number.

866131404 is an abundant number, since it is smaller than the sum of its proper divisors (1155894756).

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

866131404 is a wasteful number, since it uses less digits than its factorization.

866131404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37609 (or 37607 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 866131404 is about 29430.1104992829. The cubic root of 866131404 is about 953.2231808548.

The spelling of 866131404 in words is "eight hundred sixty-six million, one hundred thirty-one thousand, four hundred four".