621689072 has 10 divisors (see below), whose sum is σ = 1204522608. Its totient is φ = 310844528.

The previous prime is 621689053. The next prime is 621689093. The reversal of 621689072 is 270986126.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19427768 + ... + 19427799.

Almost surely, 2^621689072 is an apocalyptic number.

It is an amenable number.

621689072 is a deficient number, since it is larger than the sum of its proper divisors (582833536).

621689072 is a wasteful number, since it uses less digits than its factorization.

621689072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38855575 (or 38855569 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 621689072 is about 24933.6935089850. The cubic root of 621689072 is about 853.4755375532.

The spelling of 621689072 in words is "six hundred twenty-one million, six hundred eighty-nine thousand, seventy-two".