728479432 has 8 divisors (see below), whose sum is σ = 1365898950. Its totient is φ = 364239712.

The previous prime is 728479429. The next prime is 728479439. The reversal of 728479432 is 234974827.

It can be written as a sum of positive squares in only one way, i.e., 699814116 + 28665316 = 26454^2 + 5354^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (728479439) by changing a digit.

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 as a sum of consecutive naturals, namely, 45529957 + ... + 45529972.

Almost surely, 2^728479432 is an apocalyptic number.

It is an amenable number.

728479432 is a deficient number, since it is larger than the sum of its proper divisors (637419518).

728479432 is a wasteful number, since it uses less digits than its factorization.

728479432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91059935 (or 91059931 counting only the distinct ones).

The product of its digits is 677376, while the sum is 46.

The square root of 728479432 is about 26990.3581302657. The cubic root of 728479432 is about 899.7857234736.

The spelling of 728479432 in words is "seven hundred twenty-eight million, four hundred seventy-nine thousand, four hundred thirty-two".