731813472 has 144 divisors (see below), whose sum is σ = 2273570208. Its totient is φ = 221921280.

The previous prime is 731813461. The next prime is 731813473. The reversal of 731813472 is 274318137.

731813472 is a `hidden beast` number, since 7 + 3 + 181 + 3 + 472 = 666.

731813472 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (144).

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 (731813473) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 264448 + ... + 267200.

It is an arithmetic number, because the mean of its divisors is an integer number (15788682).

Almost surely, 2^731813472 is an apocalyptic number.

731813472 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 731813472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1136785104).

731813472 is an abundant number, since it is smaller than the sum of its proper divisors (1541756736).

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

731813472 is a wasteful number, since it uses less digits than its factorization.

731813472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2853 (or 2842 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 731813472 is about 27052.0511606791. The cubic root of 731813472 is about 901.1563211283.

The spelling of 731813472 in words is "seven hundred thirty-one million, eight hundred thirteen thousand, four hundred seventy-two".