420431394 has 16 divisors (see below), whose sum is σ = 843519168. Its totient is φ = 139701072.

The previous prime is 420431377. The next prime is 420431419. The reversal of 420431394 is 493134024.

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, 108622 + ... + 112425.

It is an arithmetic number, because the mean of its divisors is an integer number (52719948).

Almost surely, 2^420431394 is an apocalyptic number.

420431394 is an abundant number, since it is smaller than the sum of its proper divisors (423087774).

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

420431394 is a wasteful number, since it uses less digits than its factorization.

420431394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221369.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 420431394 is about 20504.4237665924. The cubic root of 420431394 is about 749.1435521461.

The spelling of 420431394 in words is "four hundred twenty million, four hundred thirty-one thousand, three hundred ninety-four".