866862404 has 12 divisors (see below), whose sum is σ = 1521513084. Its totient is φ = 432144384.

The previous prime is 866862383. The next prime is 866862421. The reversal of 866862404 is 404268668.

It can be written as a sum of positive squares in 2 ways, for example, as 432556804 + 434305600 = 20798^2 + 20840^2 .

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, 320189 + ... + 322884.

It is an arithmetic number, because the mean of its divisors is an integer number (126792757).

Almost surely, 2^866862404 is an apocalyptic number.

It is an amenable number.

866862404 is a deficient number, since it is larger than the sum of its proper divisors (654650680).

866862404 is a wasteful number, since it uses less digits than its factorization.

866862404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643414 (or 643412 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 44.

The square root of 866862404 is about 29442.5271333831. The cubic root of 866862404 is about 953.4912734341.

The spelling of 866862404 in words is "eight hundred sixty-six million, eight hundred sixty-two thousand, four hundred four".