421756072 has 64 divisors (see below), whose sum is σ = 855360000. Its totient is φ = 194351040.

The previous prime is 421756063. The next prime is 421756073. The reversal of 421756072 is 270657124.

It is not an unprimeable number, because it can be changed into a prime (421756073) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1174629 + ... + 1174987.

It is an arithmetic number, because the mean of its divisors is an integer number (13365000).

Almost surely, 2^421756072 is an apocalyptic number.

It is an amenable number.

421756072 is an abundant number, since it is smaller than the sum of its proper divisors (433603928).

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

421756072 is a wasteful number, since it uses less digits than its factorization.

421756072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574 (or 570 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 421756072 is about 20536.7006113446. The cubic root of 421756072 is about 749.9295175246.

The spelling of 421756072 in words is "four hundred twenty-one million, seven hundred fifty-six thousand, seventy-two".