621577028 has 24 divisors (see below), whose sum is σ = 1105386240. Its totient is φ = 305791200.

The previous prime is 621577009. The next prime is 621577049. The reversal of 621577028 is 820775126.

It is a junction number, because it is equal to n+sod(n) for n = 621576982 and 621577000.

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, 61133 + ... + 70571.

It is an arithmetic number, because the mean of its divisors is an integer number (46057760).

Almost surely, 2^621577028 is an apocalyptic number.

It is an amenable number.

621577028 is a deficient number, since it is larger than the sum of its proper divisors (483809212).

621577028 is a wasteful number, since it uses less digits than its factorization.

621577028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9707 (or 9705 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 38.

The square root of 621577028 is about 24931.4465685407. The cubic root of 621577028 is about 853.4242618899.

The spelling of 621577028 in words is "six hundred twenty-one million, five hundred seventy-seven thousand, twenty-eight".