629549640 has 48 divisors (see below), whose sum is σ = 2046037500. Its totient is φ = 167879808.

The previous prime is 629549639. The next prime is 629549659. The reversal of 629549640 is 46945926.

629549640 is a `hidden beast` number, since 62 + 9 + 549 + 6 + 40 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 625700196 + 3849444 = 25014^2 + 1962^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 874015 + ... + 874734.

Almost surely, 2^629549640 is an apocalyptic number.

629549640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

629549640 is an abundant number, since it is smaller than the sum of its proper divisors (1416487860).

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

629549640 is a wasteful number, since it uses less digits than its factorization.

629549640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1748766 (or 1748759 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The square root of 629549640 is about 25090.8278061924. The cubic root of 629549640 is about 857.0575662752.

The spelling of 629549640 in words is "six hundred twenty-nine million, five hundred forty-nine thousand, six hundred forty".