420873856 has 128 divisors (see below), whose sum is σ = 959616000. Its totient is φ = 182476800.

The previous prime is 420873847. The next prime is 420873863. The reversal of 420873856 is 658378024.

It is a tau number, because it is divible by the number of its divisors (128).

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, 2114845 + ... + 2115043.

It is an arithmetic number, because the mean of its divisors is an integer number (7497000).

Almost surely, 2^420873856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 420873856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (479808000).

420873856 is an abundant number, since it is smaller than the sum of its proper divisors (538742144).

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

420873856 is a wasteful number, since it uses less digits than its factorization.

420873856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298 (or 286 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 43.

The square root of 420873856 is about 20515.2103571960. The cubic root of 420873856 is about 749.4062595686.

The spelling of 420873856 in words is "four hundred twenty million, eight hundred seventy-three thousand, eight hundred fifty-six".