491400858 has 16 divisors (see below), whose sum is σ = 1058402016. Its totient is φ = 151200240.

The previous prime is 491400841. The next prime is 491400881. The reversal of 491400858 is 858004194.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3149928 + ... + 3150083.

It is an arithmetic number, because the mean of its divisors is an integer number (66150126).

Almost surely, 2^491400858 is an apocalyptic number.

491400858 is an abundant number, since it is smaller than the sum of its proper divisors (567001158).

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

491400858 is a wasteful number, since it uses less digits than its factorization.

491400858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6300029.

The product of its (nonzero) digits is 46080, while the sum is 39.

The square root of 491400858 is about 22167.5631949026. The cubic root of 491400858 is about 789.1240935637.

The spelling of 491400858 in words is "four hundred ninety-one million, four hundred thousand, eight hundred fifty-eight".