420144432 has 40 divisors (see below), whose sum is σ = 1088077680. Its totient is φ = 139699200.

The previous prime is 420144407. The next prime is 420144433. The reversal of 420144432 is 234441024.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (420144433) 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, 8932 + ... + 30332.

It is an arithmetic number, because the mean of its divisors is an integer number (27201942).

Almost surely, 2^420144432 is an apocalyptic number.

It is an amenable number.

420144432 is an abundant number, since it is smaller than the sum of its proper divisors (667933248).

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

420144432 is a wasteful number, since it uses less digits than its factorization.

420144432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21821 (or 21815 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 420144432 is about 20497.4250090103. The cubic root of 420144432 is about 748.9730727579.

Adding to 420144432 its reverse (234441024), we get a palindrome (654585456).

The spelling of 420144432 in words is "four hundred twenty million, one hundred forty-four thousand, four hundred thirty-two".