647290490 has 48 divisors (see below), whose sum is σ = 1478572704. Its totient is φ = 201751200.

The previous prime is 647290477. The next prime is 647290513. The reversal of 647290490 is 94092746.

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 23 ways as a sum of consecutive naturals, for example, 54656 + ... + 65435.

It is an arithmetic number, because the mean of its divisors is an integer number (30803598).

Almost surely, 2^647290490 is an apocalyptic number.

647290490 is an abundant number, since it is smaller than the sum of its proper divisors (831282214).

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

647290490 is a wasteful number, since it uses less digits than its factorization.

647290490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120123 (or 120116 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 647290490 is about 25441.9042133249. The cubic root of 647290490 is about 865.0337964453.

The spelling of 647290490 in words is "six hundred forty-seven million, two hundred ninety thousand, four hundred ninety".