620545404 has 12 divisors (see below), whose sum is σ = 1447939304. Its totient is φ = 206848464.

The previous prime is 620545381. The next prime is 620545411. The reversal of 620545404 is 404545026.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25856047 + ... + 25856070.

Almost surely, 2^620545404 is an apocalyptic number.

It is an amenable number.

620545404 is an abundant number, since it is smaller than the sum of its proper divisors (827393900).

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

620545404 is a wasteful number, since it uses less digits than its factorization.

620545404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51712124 (or 51712122 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

The square root of 620545404 is about 24910.7487643387. The cubic root of 620545404 is about 852.9518610820.

The spelling of 620545404 in words is "six hundred twenty million, five hundred forty-five thousand, four hundred four".