620807764 has 12 divisors (see below), whose sum is σ = 1089252864. Its totient is φ = 309592664.

The previous prime is 620807699. The next prime is 620807771. The reversal of 620807764 is 467708026.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 201082 + ... + 204145.

It is an arithmetic number, because the mean of its divisors is an integer number (90771072).

Almost surely, 2^620807764 is an apocalyptic number.

It is an amenable number.

620807764 is a deficient number, since it is larger than the sum of its proper divisors (468445100).

620807764 is a wasteful number, since it uses less digits than its factorization.

620807764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405614 (or 405612 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 40.

The square root of 620807764 is about 24916.0142077339. The cubic root of 620807764 is about 853.0720504718.

The spelling of 620807764 in words is "six hundred twenty million, eight hundred seven thousand, seven hundred sixty-four".