728406792 has 24 divisors (see below), whose sum is σ = 1972768590. Its totient is φ = 242802240.

The previous prime is 728406787. The next prime is 728406793. The reversal of 728406792 is 297604827.

It can be written as a sum of positive squares in only one way, i.e., 490445316 + 237961476 = 22146^2 + 15426^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (728406793) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5058309 + ... + 5058452.

Almost surely, 2^728406792 is an apocalyptic number.

728406792 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

728406792 is an abundant number, since it is smaller than the sum of its proper divisors (1244361798).

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

728406792 is a wasteful number, since it uses less digits than its factorization.

728406792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10116773 (or 10116766 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 728406792 is about 26989.0124309875. The cubic root of 728406792 is about 899.7558152361.

The spelling of 728406792 in words is "seven hundred twenty-eight million, four hundred six thousand, seven hundred ninety-two".