491286904 has 16 divisors (see below), whose sum is σ = 925938720. Its totient is φ = 244369920.

The previous prime is 491286899. The next prime is 491286919. The reversal of 491286904 is 409682194.

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, 157552 + ... + 160639.

It is an arithmetic number, because the mean of its divisors is an integer number (57871170).

Almost surely, 2^491286904 is an apocalyptic number.

It is an amenable number.

491286904 is a deficient number, since it is larger than the sum of its proper divisors (434651816).

491286904 is a wasteful number, since it uses less digits than its factorization.

491286904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318390 (or 318386 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 491286904 is about 22164.9927588529. The cubic root of 491286904 is about 789.0630905507.

The spelling of 491286904 in words is "four hundred ninety-one million, two hundred eighty-six thousand, nine hundred four".