421431288 has 16 divisors (see below), whose sum is σ = 1053578280. Its totient is φ = 140477088.

The previous prime is 421431253. The next prime is 421431301. The reversal of 421431288 is 882134124.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

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, 8779795 + ... + 8779842.

Almost surely, 2^421431288 is an apocalyptic number.

It is an amenable number.

421431288 is an abundant number, since it is smaller than the sum of its proper divisors (632146992).

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

421431288 is a wasteful number, since it uses less digits than its factorization.

421431288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17559646 (or 17559642 counting only the distinct ones).

The product of its digits is 12288, while the sum is 33.

The square root of 421431288 is about 20528.7916838766. The cubic root of 421431288 is about 749.7369673181.

The spelling of 421431288 in words is "four hundred twenty-one million, four hundred thirty-one thousand, two hundred eighty-eight".