620868144 has 60 divisors (see below), whose sum is σ = 1736800296. Its totient is φ = 191033856.

The previous prime is 620868121. The next prime is 620868179. The reversal of 620868144 is 441868026.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30157 + ... + 46380.

Almost surely, 2^620868144 is an apocalyptic number.

It is an amenable number.

620868144 is an abundant number, since it is smaller than the sum of its proper divisors (1115932152).

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

620868144 is a wasteful number, since it uses less digits than its factorization.

620868144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76574 (or 76555 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 39.

The square root of 620868144 is about 24917.2258487979. The cubic root of 620868144 is about 853.0997062796.

The spelling of 620868144 in words is "six hundred twenty million, eight hundred sixty-eight thousand, one hundred forty-four".