620643256 has 16 divisors (see below), whose sum is σ = 1168036200. Its totient is φ = 309166944.

The previous prime is 620643251. The next prime is 620643269. The reversal of 620643256 is 652346026.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620643251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142050 + ... + 146353.

Almost surely, 2^620643256 is an apocalyptic number.

It is an amenable number.

620643256 is a deficient number, since it is larger than the sum of its proper divisors (547392944).

620643256 is a wasteful number, since it uses less digits than its factorization.

620643256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288678 (or 288674 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 34.

The square root of 620643256 is about 24912.7127386802. The cubic root of 620643256 is about 852.9966918918.

The spelling of 620643256 in words is "six hundred twenty million, six hundred forty-three thousand, two hundred fifty-six".