620417920 has 32 divisors (see below), whose sum is σ = 1483188120. Its totient is φ = 248166912.

The previous prime is 620417891. The next prime is 620417921. The reversal of 620417920 is 29714026.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620417921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 484062 + ... + 485341.

Almost surely, 2^620417920 is an apocalyptic number.

It is an amenable number.

620417920 is an abundant number, since it is smaller than the sum of its proper divisors (862770200).

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

620417920 is an equidigital number, since it uses as much as digits as its factorization.

620417920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 969422 (or 969410 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 620417920 is about 24908.1898178089. The cubic root of 620417920 is about 852.8934473266.

The spelling of 620417920 in words is "six hundred twenty million, four hundred seventeen thousand, nine hundred twenty".