728372330 has 32 divisors (see below), whose sum is σ = 1522938240. Its totient is φ = 245632320.

The previous prime is 728372299. The next prime is 728372363. The reversal of 728372330 is 33273827.

It is a super-2 number, since 2×728372330² = 1061052502219257800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81020 + ... + 89559.

It is an arithmetic number, because the mean of its divisors is an integer number (47591820).

Almost surely, 2^728372330 is an apocalyptic number.

728372330 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

728372330 is an abundant number, since it is smaller than the sum of its proper divisors (794565910).

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

728372330 is a wasteful number, since it uses less digits than its factorization.

728372330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170654.

The product of its (nonzero) digits is 42336, while the sum is 35.

The square root of 728372330 is about 26988.3739784375. The cubic root of 728372330 is about 899.7416254207.

The spelling of 728372330 in words is "seven hundred twenty-eight million, three hundred seventy-two thousand, three hundred thirty".