629439990 has 32 divisors (see below), whose sum is σ = 1511896320. Its totient is φ = 167712864.

The previous prime is 629439973. The next prime is 629440003. The reversal of 629439990 is 99934926.

It is a super-2 number, since 2×629439990² = 792389402022400200, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 31617 + ... + 47523.

It is an arithmetic number, because the mean of its divisors is an integer number (47246760).

Almost surely, 2^629439990 is an apocalyptic number.

629439990 is an abundant number, since it is smaller than the sum of its proper divisors (882456330).

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

629439990 is a wasteful number, since it uses less digits than its factorization.

629439990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17236.

The product of its (nonzero) digits is 944784, while the sum is 51.

The square root of 629439990 is about 25088.6426496134. The cubic root of 629439990 is about 857.0078048729.

The spelling of 629439990 in words is "six hundred twenty-nine million, four hundred thirty-nine thousand, nine hundred ninety".