620403656 has 64 divisors (see below), whose sum is σ = 1307750400. Its totient is φ = 274494528.

The previous prime is 620403601. The next prime is 620403673. The reversal of 620403656 is 656304026.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148265 + ... + 152391.

It is an arithmetic number, because the mean of its divisors is an integer number (20433600).

Almost surely, 2^620403656 is an apocalyptic number.

It is an amenable number.

620403656 is an abundant number, since it is smaller than the sum of its proper divisors (687346744).

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

620403656 is a wasteful number, since it uses less digits than its factorization.

620403656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4218 (or 4214 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 620403656 is about 24907.9034846372. The cubic root of 620403656 is about 852.8869109985.

The spelling of 620403656 in words is "six hundred twenty million, four hundred three thousand, six hundred fifty-six".