621030056 has 16 divisors (see below), whose sum is σ = 1164860340. Its totient is φ = 310400640.

The previous prime is 621030023. The next prime is 621030071. The reversal of 621030056 is 650030126.

It can be written as a sum of positive squares in 2 ways, for example, as 542424100 + 78605956 = 23290^2 + 8866^2 .

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, 11516 + ... + 37076.

Almost surely, 2^621030056 is an apocalyptic number.

It is an amenable number.

621030056 is a deficient number, since it is larger than the sum of its proper divisors (543830284).

621030056 is a wasteful number, since it uses less digits than its factorization.

621030056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28604 (or 28600 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 621030056 is about 24920.4746343243. The cubic root of 621030056 is about 853.1738578664.

The spelling of 621030056 in words is "six hundred twenty-one million, thirty thousand, fifty-six".