620773688 has 8 divisors (see below), whose sum is σ = 1163950680. Its totient is φ = 310386840.

The previous prime is 620773663. The next prime is 620773691. The reversal of 620773688 is 886377026.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38798348 + ... + 38798363.

It is an arithmetic number, because the mean of its divisors is an integer number (145493835).

Almost surely, 2^620773688 is an apocalyptic number.

It is an amenable number.

620773688 is a deficient number, since it is larger than the sum of its proper divisors (543176992).

620773688 is a wasteful number, since it uses less digits than its factorization.

620773688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77596717 (or 77596713 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 47.

The square root of 620773688 is about 24915.3303811127. The cubic root of 620773688 is about 853.0564418745.

The spelling of 620773688 in words is "six hundred twenty million, seven hundred seventy-three thousand, six hundred eighty-eight".