420992478 has 40 divisors (see below), whose sum is σ = 975874680. Its totient is φ = 135490320.

The previous prime is 420992447. The next prime is 420992503. The reversal of 420992478 is 874299024.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 40108 + ... + 49503.

It is an arithmetic number, because the mean of its divisors is an integer number (24396867).

Almost surely, 2^420992478 is an apocalyptic number.

420992478 is an abundant number, since it is smaller than the sum of its proper divisors (554882202).

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

420992478 is a wasteful number, since it uses less digits than its factorization.

420992478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89654 (or 89645 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 420992478 is about 20518.1012279402. The cubic root of 420992478 is about 749.4766589037.

The spelling of 420992478 in words is "four hundred twenty million, nine hundred ninety-two thousand, four hundred seventy-eight".