420631372 has 12 divisors (see below), whose sum is σ = 841262800. Its totient is φ = 180270576.

The previous prime is 420631349. The next prime is 420631381. The reversal of 420631372 is 273136024.

420631372 is an admirable number.

It is a super-2 number, since 2×420631372² = 353861502221204768, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 15022549 = 420631372 / (4 + 2 + 0 + 6 + 3 + 1 + 3 + 7 + 2).

It is a self number, because there is not a number n which added to its sum of digits gives 420631372.

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, 7511247 + ... + 7511302.

Almost surely, 2^420631372 is an apocalyptic number.

It is an amenable number.

420631372 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

420631372 is a wasteful number, since it uses less digits than its factorization.

420631372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15022560 (or 15022558 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 420631372 is about 20509.2996467456. The cubic root of 420631372 is about 749.2623099149.

Adding to 420631372 its reverse (273136024), we get a palindrome (693767396).

The spelling of 420631372 in words is "four hundred twenty million, six hundred thirty-one thousand, three hundred seventy-two".