620840684 has 24 divisors (see below), whose sum is σ = 1095973200. Its totient is φ = 307714496.

The previous prime is 620840677. The next prime is 620840707. The reversal of 620840684 is 486048026.

It is a happy 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, 474359 + ... + 475665.

It is an arithmetic number, because the mean of its divisors is an integer number (45665550).

Almost surely, 2^620840684 is an apocalyptic number.

It is an amenable number.

620840684 is a deficient number, since it is larger than the sum of its proper divisors (475132516).

620840684 is a wasteful number, since it uses less digits than its factorization.

620840684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2257 (or 2255 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 38.

The square root of 620840684 is about 24916.6748182818. The cubic root of 620840684 is about 853.0871290179.

The spelling of 620840684 in words is "six hundred twenty million, eight hundred forty thousand, six hundred eighty-four".