491580942 has 32 divisors (see below), whose sum is σ = 1047416832. Its totient is φ = 153270144.

The previous prime is 491580937. The next prime is 491580961. The reversal of 491580942 is 249085194.

It is a junction number, because it is equal to n+sod(n) for n = 491580894 and 491580903.

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, 1843 + ... + 31409.

It is an arithmetic number, because the mean of its divisors is an integer number (32731776).

Almost surely, 2^491580942 is an apocalyptic number.

491580942 is an abundant number, since it is smaller than the sum of its proper divisors (555835890).

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

491580942 is a wasteful number, since it uses less digits than its factorization.

491580942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29752.

The product of its (nonzero) digits is 103680, while the sum is 42.

The square root of 491580942 is about 22171.6247036612. The cubic root of 491580942 is about 789.2204787348.

The spelling of 491580942 in words is "four hundred ninety-one million, five hundred eighty thousand, nine hundred forty-two".