490639644 has 36 divisors (see below), whose sum is σ = 1352977080. Its totient is φ = 148678560.

The previous prime is 490639637. The next prime is 490639663. The reversal of 490639644 is 446936094.

It is a happy number.

490639644 is a `hidden beast` number, since 4 + 9 + 0 + 639 + 6 + 4 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 490639644.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 619099 + ... + 619890.

Almost surely, 2^490639644 is an apocalyptic number.

490639644 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

490639644 is an abundant number, since it is smaller than the sum of its proper divisors (862337436).

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

490639644 is a wasteful number, since it uses less digits than its factorization.

490639644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1239010 (or 1239005 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 45.

The square root of 490639644 is about 22150.3869943620. The cubic root of 490639644 is about 788.7164136716.

The spelling of 490639644 in words is "four hundred ninety million, six hundred thirty-nine thousand, six hundred forty-four".