491250390 has 16 divisors (see below), whose sum is σ = 1179001008. Its totient is φ = 131000096.

The previous prime is 491250371. The next prime is 491250421. The reversal of 491250390 is 93052194.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8187477 + ... + 8187536.

It is an arithmetic number, because the mean of its divisors is an integer number (73687563).

Almost surely, 2^491250390 is an apocalyptic number.

491250390 is an abundant number, since it is smaller than the sum of its proper divisors (687750618).

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

491250390 is a wasteful number, since it uses less digits than its factorization.

491250390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16375023.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 491250390 is about 22164.1690572870. The cubic root of 491250390 is about 789.0435415097.

The spelling of 491250390 in words is "four hundred ninety-one million, two hundred fifty thousand, three hundred ninety".