721233432 has 48 divisors (see below), whose sum is σ = 2068246440. Its totient is φ = 226268928.

The previous prime is 721233431. The next prime is 721233433. The reversal of 721233432 is 234332127.

721233432 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (721233431) and next prime (721233433).

It is a junction number, because it is equal to n+sod(n) for n = 721233396 and 721233405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721233431) 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, 293398 + ... + 295845.

Almost surely, 2^721233432 is an apocalyptic number.

721233432 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

721233432 is an abundant number, since it is smaller than the sum of its proper divisors (1347013008).

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

721233432 is a wasteful number, since it uses less digits than its factorization.

721233432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 589272 (or 589265 counting only the distinct ones).

The product of its digits is 6048, while the sum is 27.

The square root of 721233432 is about 26855.7895434113. The cubic root of 721233432 is about 896.7924636289.

Adding to 721233432 its reverse (234332127), we get a palindrome (955565559).

The spelling of 721233432 in words is "seven hundred twenty-one million, two hundred thirty-three thousand, four hundred thirty-two".