420656456 has 16 divisors (see below), whose sum is σ = 860433840. Its totient is φ = 191207440.

The previous prime is 420656443. The next prime is 420656471. The reversal of 420656456 is 654656024.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2390006 + ... + 2390181.

It is an arithmetic number, because the mean of its divisors is an integer number (53777115).

Almost surely, 2^420656456 is an apocalyptic number.

It is an amenable number.

420656456 is an abundant number, since it is smaller than the sum of its proper divisors (439777384).

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

420656456 is a wasteful number, since it uses less digits than its factorization.

420656456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4780204 (or 4780200 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 38.

The square root of 420656456 is about 20509.9111650928. The cubic root of 420656456 is about 749.2772034959.

The spelling of 420656456 in words is "four hundred twenty million, six hundred fifty-six thousand, four hundred fifty-six".