629138624 has 28 divisors (see below), whose sum is σ = 1255367568. Its totient is φ = 312825600.

The previous prime is 629138623. The next prime is 629138681. The reversal of 629138624 is 426831926.

It is a super-2 number, since 2×629138624² = 791630816417226752, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (629138623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15572 + ... + 38739.

It is an arithmetic number, because the mean of its divisors is an integer number (44834556).

Almost surely, 2^629138624 is an apocalyptic number.

629138624 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

629138624 is a deficient number, since it is larger than the sum of its proper divisors (626228944).

629138624 is a wasteful number, since it uses less digits than its factorization.

629138624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54504 (or 54494 counting only the distinct ones).

The product of its digits is 124416, while the sum is 41.

The square root of 629138624 is about 25082.6359061403. The cubic root of 629138624 is about 856.8710090713.

The spelling of 629138624 in words is "six hundred twenty-nine million, one hundred thirty-eight thousand, six hundred twenty-four".