491765286 has 32 divisors (see below), whose sum is σ = 1022934528. Its totient is φ = 157479840.

The previous prime is 491765279. The next prime is 491765311. The reversal of 491765286 is 682567194.

It is a congruent number.

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, 115 + ... + 31361.

It is an arithmetic number, because the mean of its divisors is an integer number (31966704).

Almost surely, 2^491765286 is an apocalyptic number.

491765286 is an abundant number, since it is smaller than the sum of its proper divisors (531169242).

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

491765286 is a wasteful number, since it uses less digits than its factorization.

491765286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31356.

The product of its digits is 725760, while the sum is 48.

The square root of 491765286 is about 22175.7815194865. The cubic root of 491765286 is about 789.3191195792.

The spelling of 491765286 in words is "four hundred ninety-one million, seven hundred sixty-five thousand, two hundred eighty-six".