731268432 has 80 divisors (see below), whose sum is σ = 2105658880. Its totient is φ = 242984448.

The previous prime is 731268431. The next prime is 731268443. The reversal of 731268432 is 234862137.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (731268431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143073 + ... + 148095.

It is an arithmetic number, because the mean of its divisors is an integer number (26320736).

Almost surely, 2^731268432 is an apocalyptic number.

731268432 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 731268432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1052829440).

731268432 is an abundant number, since it is smaller than the sum of its proper divisors (1374390448).

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

731268432 is a wasteful number, since it uses less digits than its factorization.

731268432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5377 (or 5365 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 731268432 is about 27041.9753716329. The cubic root of 731268432 is about 900.9325445115.

The spelling of 731268432 in words is "seven hundred thirty-one million, two hundred sixty-eight thousand, four hundred thirty-two".