421424432 has 40 divisors (see below), whose sum is σ = 959261520. Its totient is φ = 176820480.

The previous prime is 421424431. The next prime is 421424483. The reversal of 421424432 is 234424124.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (421424431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89807 + ... + 94382.

It is an arithmetic number, because the mean of its divisors is an integer number (23981538).

Almost surely, 2^421424432 is an apocalyptic number.

It is an amenable number.

421424432 is an abundant number, since it is smaller than the sum of its proper divisors (537837088).

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

421424432 is a wasteful number, since it uses less digits than its factorization.

421424432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184221 (or 184215 counting only the distinct ones).

The product of its digits is 6144, while the sum is 26.

The square root of 421424432 is about 20528.6246982110. The cubic root of 421424432 is about 749.7329016300.

Adding to 421424432 its reverse (234424124), we get a palindrome (655848556).

The spelling of 421424432 in words is "four hundred twenty-one million, four hundred twenty-four thousand, four hundred thirty-two".