491268090 has 16 divisors (see below), whose sum is σ = 1179043488. Its totient is φ = 131004816.

The previous prime is 491268073. The next prime is 491268097. The reversal of 491268090 is 90862194.

It is not an unprimeable number, because it can be changed into a prime (491268097) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8187772 + ... + 8187831.

It is an arithmetic number, because the mean of its divisors is an integer number (73690218).

Almost surely, 2^491268090 is an apocalyptic number.

491268090 is an abundant number, since it is smaller than the sum of its proper divisors (687775398).

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

491268090 is a wasteful number, since it uses less digits than its factorization.

491268090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16375613.

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 491268090 is about 22164.5683468007. The cubic root of 491268090 is about 789.0530179418.

The spelling of 491268090 in words is "four hundred ninety-one million, two hundred sixty-eight thousand, ninety".