620684865 has 24 divisors (see below), whose sum is σ = 1076482368. Its totient is φ = 330838560.

The previous prime is 620684863. The next prime is 620684881. The reversal of 620684865 is 568486026.

It is not a de Polignac number, because 620684865 - 2¹ = 620684863 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 620684865.

It is not an unprimeable number, because it can be changed into a prime (620684863) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 108220 + ... + 113810.

It is an arithmetic number, because the mean of its divisors is an integer number (44853432).

Almost surely, 2^620684865 is an apocalyptic number.

It is an amenable number.

620684865 is a deficient number, since it is larger than the sum of its proper divisors (455797503).

620684865 is a wasteful number, since it uses less digits than its factorization.

620684865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8069 (or 8066 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The square root of 620684865 is about 24913.5478204129. The cubic root of 620684865 is about 853.0157535915.

The spelling of 620684865 in words is "six hundred twenty million, six hundred eighty-four thousand, eight hundred sixty-five".