620644404 has 24 divisors (see below), whose sum is σ = 1450447488. Its totient is φ = 206556160.

The previous prime is 620644379. The next prime is 620644417. The reversal of 620644404 is 404446026.

It is a congruent number.

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, 32652 + ... + 48035.

It is an arithmetic number, because the mean of its divisors is an integer number (60435312).

Almost surely, 2^620644404 is an apocalyptic number.

It is an amenable number.

620644404 is an abundant number, since it is smaller than the sum of its proper divisors (829803084).

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

620644404 is a wasteful number, since it uses less digits than its factorization.

620644404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81335 (or 81333 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 30.

The square root of 620644404 is about 24912.7357791151. The cubic root of 620644404 is about 852.9972178190.

The spelling of 620644404 in words is "six hundred twenty million, six hundred forty-four thousand, four hundred four".