629561540 has 12 divisors (see below), whose sum is σ = 1322079276. Its totient is φ = 251824608.

The previous prime is 629561531. The next prime is 629561633. The reversal of 629561540 is 45165926.

It can be written as a sum of positive squares in 2 ways, for example, as 446392384 + 183169156 = 21128^2 + 13534^2 .

It is a junction number, because it is equal to n+sod(n) for n = 629561494 and 629561503.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15739019 + ... + 15739058.

It is an arithmetic number, because the mean of its divisors is an integer number (110173273).

Almost surely, 2^629561540 is an apocalyptic number.

It is an amenable number.

629561540 is an abundant number, since it is smaller than the sum of its proper divisors (692517736).

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

629561540 is a wasteful number, since it uses less digits than its factorization.

629561540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31478086 (or 31478084 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 629561540 is about 25091.0649435212. The cubic root of 629561540 is about 857.0629663899.

The spelling of 629561540 in words is "six hundred twenty-nine million, five hundred sixty-one thousand, five hundred forty".