421384536 has 48 divisors (see below), whose sum is σ = 1152350160. Its totient is φ = 139095360.

The previous prime is 421384531. The next prime is 421384583. The reversal of 421384536 is 635483124.

421384536 is a `hidden beast` number, since 42 + 1 + 3 + 84 + 536 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 421384536.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421384531) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20995 + ... + 35826.

It is an arithmetic number, because the mean of its divisors is an integer number (24007295).

Almost surely, 2^421384536 is an apocalyptic number.

It is an amenable number.

421384536 is an abundant number, since it is smaller than the sum of its proper divisors (730965624).

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

421384536 is a wasteful number, since it uses less digits than its factorization.

421384536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56936 (or 56929 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 421384536 is about 20527.6529588748. The cubic root of 421384536 is about 749.7092419609.

The spelling of 421384536 in words is "four hundred twenty-one million, three hundred eighty-four thousand, five hundred thirty-six".