620406456 has 32 divisors (see below), whose sum is σ = 1551791760. Its totient is φ = 206698752.

The previous prime is 620406443. The next prime is 620406461. The reversal of 620406456 is 654604026.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54126 + ... + 64578.

Almost surely, 2^620406456 is an apocalyptic number.

It is an amenable number.

620406456 is an abundant number, since it is smaller than the sum of its proper divisors (931385304).

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

620406456 is a wasteful number, since it uses less digits than its factorization.

620406456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12935 (or 12931 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 620406456 is about 24907.9596916327. The cubic root of 620406456 is about 852.8881940770. Note that the first 3 decimals are identical.

The spelling of 620406456 in words is "six hundred twenty million, four hundred six thousand, four hundred fifty-six".