621604648 has 32 divisors (see below), whose sum is σ = 1354593600. Its totient is φ = 261885312.

The previous prime is 621604597. The next prime is 621604667. The reversal of 621604648 is 846406126.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90765 + ... + 97372.

It is an arithmetic number, because the mean of its divisors is an integer number (42331050).

Almost surely, 2^621604648 is an apocalyptic number.

It is an amenable number.

621604648 is an abundant number, since it is smaller than the sum of its proper divisors (732988952).

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

621604648 is a wasteful number, since it uses less digits than its factorization.

621604648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188209 (or 188205 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 621604648 is about 24932.0004813092. Note that the first 3 decimals coincide. The cubic root of 621604648 is about 853.4369024412.

The spelling of 621604648 in words is "six hundred twenty-one million, six hundred four thousand, six hundred forty-eight".