728802440 has 32 divisors (see below), whose sum is σ = 1647596160. Its totient is φ = 290136000.

The previous prime is 728802439. The next prime is 728802457. The reversal of 728802440 is 44208827.

It is a self number, because there is not a number n which added to its sum of digits gives 728802440.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34736 + ... + 51615.

It is an arithmetic number, because the mean of its divisors is an integer number (51487380).

Almost surely, 2^728802440 is an apocalyptic number.

It is an amenable number.

728802440 is an abundant number, since it is smaller than the sum of its proper divisors (918793720).

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

728802440 is a wasteful number, since it uses less digits than its factorization.

728802440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86573 (or 86569 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 35.

The square root of 728802440 is about 26996.3412335820. The cubic root of 728802440 is about 899.9186922432.

The spelling of 728802440 in words is "seven hundred twenty-eight million, eight hundred two thousand, four hundred forty".