620520656 has 40 divisors (see below), whose sum is σ = 1421397120. Its totient is φ = 256765824.

The previous prime is 620520653. The next prime is 620520683. The reversal of 620520656 is 656025026.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620520653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92276 + ... + 98771.

It is an arithmetic number, because the mean of its divisors is an integer number (35534928).

Almost surely, 2^620520656 is an apocalyptic number.

It is an amenable number.

620520656 is an abundant number, since it is smaller than the sum of its proper divisors (800876464).

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

620520656 is a wasteful number, since it uses less digits than its factorization.

620520656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191091 (or 191085 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 620520656 is about 24910.2520260233. The cubic root of 620520656 is about 852.9405220603.

The spelling of 620520656 in words is "six hundred twenty million, five hundred twenty thousand, six hundred fifty-six".