421891488 has 36 divisors (see below), whose sum is σ = 1199754738. Its totient is φ = 140630400.

The previous prime is 421891471. The next prime is 421891513. The reversal of 421891488 is 884198124.

421891488 is a `hidden beast` number, since 421 + 89 + 148 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 262828944 + 159062544 = 16212^2 + 12612^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

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, 732163 + ... + 732738.

Almost surely, 2^421891488 is an apocalyptic number.

421891488 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

421891488 is an abundant number, since it is smaller than the sum of its proper divisors (777863250).

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

421891488 is a wasteful number, since it uses less digits than its factorization.

421891488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1464917 (or 1464906 counting only the distinct ones).

The product of its digits is 147456, while the sum is 45.

The square root of 421891488 is about 20539.9972736123. The cubic root of 421891488 is about 750.0097705394.

The spelling of 421891488 in words is "four hundred twenty-one million, eight hundred ninety-one thousand, four hundred eighty-eight".