420023232 has 70 divisors (see below), whose sum is σ = 1245095808. Its totient is φ = 140006016.

The previous prime is 420023207. The next prime is 420023273. The reversal of 420023232 is 232320024.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 35328 + ... + 45695.

Almost surely, 2^420023232 is an apocalyptic number.

It is an amenable number.

420023232 is an abundant number, since it is smaller than the sum of its proper divisors (825072576).

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

420023232 is an equidigital number, since it uses as much as digits as its factorization.

420023232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81047 (or 81028 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 420023232 is about 20494.4683268437. The cubic root of 420023232 is about 748.9010465215.

Adding to 420023232 its reverse (232320024), we get a palindrome (652343256).

The spelling of 420023232 in words is "four hundred twenty million, twenty-three thousand, two hundred thirty-two".