620928020 has 24 divisors (see below), whose sum is σ = 1305817800. Its totient is φ = 248015232.

The previous prime is 620928017. The next prime is 620928023. The reversal of 620928020 is 20829026.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (620928017) and next prime (620928023).

It can be written as a sum of positive squares in 4 ways, for example, as 56580484 + 564347536 = 7522^2 + 23756^2 .

It is a super-2 number, since 2×620928020² = 771103212042240800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620928023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7715 + ... + 36074.

It is an arithmetic number, because the mean of its divisors is an integer number (54409075).

Almost surely, 2^620928020 is an apocalyptic number.

It is an amenable number.

620928020 is an abundant number, since it is smaller than the sum of its proper divisors (684889780).

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

620928020 is a wasteful number, since it uses less digits than its factorization.

620928020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44507 (or 44505 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 620928020 is about 24918.4273179509. The cubic root of 620928020 is about 853.1271294700.

The spelling of 620928020 in words is "six hundred twenty million, nine hundred twenty-eight thousand, twenty".