728432516 has 12 divisors (see below), whose sum is σ = 1456865088. Its totient is φ = 312185352.

The previous prime is 728432501. The next prime is 728432531. The reversal of 728432516 is 615234827.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (728432501) and next prime (728432531).

728432516 is an admirable number.

It is a super-2 number, since 2×728432516² = 1061227860732180512, which contains 22 as substring.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 728432516.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13007696 + ... + 13007751.

It is an arithmetic number, because the mean of its divisors is an integer number (121405424).

Almost surely, 2^728432516 is an apocalyptic number.

It is an amenable number.

728432516 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

728432516 is a wasteful number, since it uses less digits than its factorization.

728432516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26015458 (or 26015456 counting only the distinct ones).

The product of its digits is 80640, while the sum is 38.

The square root of 728432516 is about 26989.4889910869. The cubic root of 728432516 is about 899.7664068663.

The spelling of 728432516 in words is "seven hundred twenty-eight million, four hundred thirty-two thousand, five hundred sixteen".