731372328 has 40 divisors (see below), whose sum is σ = 2048521530. Its totient is φ = 243790560.

The previous prime is 731372297. The next prime is 731372333. The reversal of 731372328 is 823273137.

It can be written as a sum of positive squares in only one way, i.e., 607228164 + 124144164 = 24642^2 + 11142^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 731372292 and 731372301.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 563683 + ... + 564978.

Almost surely, 2^731372328 is an apocalyptic number.

It is an amenable number.

731372328 is an abundant number, since it is smaller than the sum of its proper divisors (1317149202).

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

731372328 is a wasteful number, since it uses less digits than its factorization.

731372328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128679 (or 1128666 counting only the distinct ones).

The product of its digits is 42336, while the sum is 36.

The square root of 731372328 is about 27043.8963169141. The cubic root of 731372328 is about 900.9752095809.

The spelling of 731372328 in words is "seven hundred thirty-one million, three hundred seventy-two thousand, three hundred twenty-eight".