629539840 has 44 divisors (see below), whose sum is σ = 1510170156. Its totient is φ = 251813888.

The previous prime is 629539819. The next prime is 629539843. The reversal of 629539840 is 48935926.

It can be written as a sum of positive squares in 2 ways, for example, as 451477504 + 178062336 = 21248^2 + 13344^2 .

It is not an unprimeable number, because it can be changed into a prime (629539843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56359 + ... + 66598.

It is an arithmetic number, because the mean of its divisors is an integer number (34322049).

Almost surely, 2^629539840 is an apocalyptic number.

It is an amenable number.

629539840 is an abundant number, since it is smaller than the sum of its proper divisors (880630316).

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

629539840 is a wasteful number, since it uses less digits than its factorization.

629539840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122982 (or 122964 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 46.

The square root of 629539840 is about 25090.6325149447. The cubic root of 629539840 is about 857.0531190709.

The spelling of 629539840 in words is "six hundred twenty-nine million, five hundred thirty-nine thousand, eight hundred forty".