620391330 has 48 divisors (see below), whose sum is σ = 1737099000. Its totient is φ = 152711424.

The previous prime is 620391329. The next prime is 620391347. The reversal of 620391330 is 33193026.

620391330 is a `hidden beast` number, since 620 + 3 + 9 + 1 + 3 + 30 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 543495969 + 76895361 = 23313^2 + 8769^2 .

It is a junction number, because it is equal to n+sod(n) for n = 620391294 and 620391303.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 263955 + ... + 266294.

Almost surely, 2^620391330 is an apocalyptic number.

620391330 is an abundant number, since it is smaller than the sum of its proper divisors (1116707670).

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

620391330 is a wasteful number, since it uses less digits than its factorization.

620391330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530275 (or 530272 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 27.

The square root of 620391330 is about 24907.6560519050. The cubic root of 620391330 is about 852.8812626578.

The spelling of 620391330 in words is "six hundred twenty million, three hundred ninety-one thousand, three hundred thirty".