491790898 has 8 divisors (see below), whose sum is σ = 738346608. Its totient is φ = 245675364.

The previous prime is 491790883. The next prime is 491790979. The reversal of 491790898 is 898097194.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107236 + ... + 111727.

It is an arithmetic number, because the mean of its divisors is an integer number (92293326).

Almost surely, 2^491790898 is an apocalyptic number.

491790898 is a deficient number, since it is larger than the sum of its proper divisors (246555710).

491790898 is a wasteful number, since it uses less digits than its factorization.

491790898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220088.

The product of its (nonzero) digits is 1306368, while the sum is 55.

The square root of 491790898 is about 22176.3589887971. The cubic root of 491790898 is about 789.3328223834.

The spelling of 491790898 in words is "four hundred ninety-one million, seven hundred ninety thousand, eight hundred ninety-eight".