421387632 has 60 divisors (see below), whose sum is σ = 1219977720. Its totient is φ = 135617664.

The previous prime is 421387607. The next prime is 421387633. The reversal of 421387632 is 236783124.

It is a happy number.

421387632 is a `hidden beast` number, since 4 + 2 + 13 + 8 + 7 + 632 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421387633) 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, 46278 + ... + 54629.

It is an arithmetic number, because the mean of its divisors is an integer number (20332962).

Almost surely, 2^421387632 is an apocalyptic number.

It is an amenable number.

421387632 is an abundant number, since it is smaller than the sum of its proper divisors (798590088).

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

421387632 is a wasteful number, since it uses less digits than its factorization.

421387632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100950 (or 100941 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 421387632 is about 20527.7283692083. The cubic root of 421387632 is about 749.7110780464.

It can be divided in two parts, 42138 and 7632, that added together give a triangular number (49770 = T₃₁₅).

The spelling of 421387632 in words is "four hundred twenty-one million, three hundred eighty-seven thousand, six hundred thirty-two".