420856896 has 56 divisors (see below), whose sum is σ = 1179027360. Its totient is φ = 132032512.

The previous prime is 420856823. The next prime is 420856939. The reversal of 420856896 is 698658024.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 61206 + ... + 67733.

It is an arithmetic number, because the mean of its divisors is an integer number (21054060).

Almost surely, 2^420856896 is an apocalyptic number.

It is an amenable number.

420856896 is an abundant number, since it is smaller than the sum of its proper divisors (758170464).

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

420856896 is a wasteful number, since it uses less digits than its factorization.

420856896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128971 (or 128961 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 48.

The square root of 420856896 is about 20514.7970011892. The cubic root of 420856896 is about 749.3961931312.

The spelling of 420856896 in words is "four hundred twenty million, eight hundred fifty-six thousand, eight hundred ninety-six".