421209792 has 42 divisors (see below), whose sum is σ = 1207323468. Its totient is φ = 140403072.

The previous prime is 421209779. The next prime is 421209839. The reversal of 421209792 is 297902124.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 365058 + ... + 366209.

Almost surely, 2^421209792 is an apocalyptic number.

It is an amenable number.

421209792 is an abundant number, since it is smaller than the sum of its proper divisors (786113676).

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

421209792 is a wasteful number, since it uses less digits than its factorization.

421209792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731285 (or 731272 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 421209792 is about 20523.3962101792. The cubic root of 421209792 is about 749.6055952963.

The spelling of 421209792 in words is "four hundred twenty-one million, two hundred nine thousand, seven hundred ninety-two".