630490889 has 24 divisors (see below), whose sum is σ = 775081440. Its totient is φ = 509955264.

The previous prime is 630490879. The next prime is 630490901. The reversal of 630490889 is 988094036.

It is not a de Polignac number, because 630490889 - 2²⁸ = 362055433 is a prime.

It is a super-2 number, since 2×630490889² = 795037522224020642, which contains 22 as substring.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (630490859) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 262277 + ... + 264669.

It is an arithmetic number, because the mean of its divisors is an integer number (32295060).

Almost surely, 2^630490889 is an apocalyptic number.

It is an amenable number.

630490889 is a deficient number, since it is larger than the sum of its proper divisors (144590551).

630490889 is a wasteful number, since it uses less digits than its factorization.

630490889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2709 (or 2702 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 47.

The square root of 630490889 is about 25109.5776348389. The cubic root of 630490889 is about 857.4844867386.

The spelling of 630490889 in words is "six hundred thirty million, four hundred ninety thousand, eight hundred eighty-nine".