620733764 has 18 divisors (see below), whose sum is σ = 1263636990. Its totient is φ = 266028672.

The previous prime is 620733713. The next prime is 620733769. The reversal of 620733764 is 467337026.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 617522500 + 3211264 = 24850^2 + 1792^2 .

It is not an unprimeable number, because it can be changed into a prime (620733769) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1583309 + ... + 1583700.

It is an arithmetic number, because the mean of its divisors is an integer number (70202055).

Almost surely, 2^620733764 is an apocalyptic number.

It is an amenable number.

620733764 is an abundant number, since it is smaller than the sum of its proper divisors (642903226).

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

620733764 is a wasteful number, since it uses less digits than its factorization.

620733764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3167027 (or 3167018 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 38.

The square root of 620733764 is about 24914.5291747607. The cubic root of 620733764 is about 853.0381538595.

The spelling of 620733764 in words is "six hundred twenty million, seven hundred thirty-three thousand, seven hundred sixty-four".