420391372 has 18 divisors (see below), whose sum is σ = 760189164. Its totient is φ = 203413320.

The previous prime is 420391369. The next prime is 420391379. The reversal of 420391372 is 273193024.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (420391379) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 50838 + ... + 58525.

Almost surely, 2^420391372 is an apocalyptic number.

It is an amenable number.

420391372 is a deficient number, since it is larger than the sum of its proper divisors (339797792).

420391372 is a wasteful number, since it uses less digits than its factorization.

420391372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109429 (or 109396 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 420391372 is about 20503.4478076249. The cubic root of 420391372 is about 749.1197803924.

The spelling of 420391372 in words is "four hundred twenty million, three hundred ninety-one thousand, three hundred seventy-two".