621636948 has 36 divisors (see below), whose sum is σ = 1573271700. Its totient is φ = 206960256.

The previous prime is 621636941. The next prime is 621636949. The reversal of 621636948 is 849636126.

621636948 is a `hidden beast` number, since 6 + 2 + 1 + 636 + 9 + 4 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 451647504 + 169989444 = 21252^2 + 13038^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621636941) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20778 + ... + 40926.

Almost surely, 2^621636948 is an apocalyptic number.

It is an amenable number.

621636948 is an abundant number, since it is smaller than the sum of its proper divisors (951634752).

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

621636948 is a wasteful number, since it uses less digits than its factorization.

621636948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21016 (or 21011 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 621636948 is about 24932.6482347945. The cubic root of 621636948 is about 853.4516843634.

The spelling of 621636948 in words is "six hundred twenty-one million, six hundred thirty-six thousand, nine hundred forty-eight".