621132432 has 40 divisors (see below), whose sum is σ = 1619601696. Its totient is φ = 205107456.

The previous prime is 621132403. The next prime is 621132487. The reversal of 621132432 is 234231126.

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

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55333 + ... + 65604.

Almost surely, 2^621132432 is an apocalyptic number.

It is an amenable number.

621132432 is an abundant number, since it is smaller than the sum of its proper divisors (998469264).

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

621132432 is a wasteful number, since it uses less digits than its factorization.

621132432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121055 (or 121049 counting only the distinct ones).

The product of its digits is 1728, while the sum is 24.

The square root of 621132432 is about 24922.5286036550. The cubic root of 621132432 is about 853.2207368255.

Adding to 621132432 its reverse (234231126), we get a palindrome (855363558).

The spelling of 621132432 in words is "six hundred twenty-one million, one hundred thirty-two thousand, four hundred thirty-two".