728479431 has 24 divisors (see below), whose sum is σ = 1096215120. Its totient is φ = 465763200.

The previous prime is 728479429. The next prime is 728479439. The reversal of 728479431 is 134974827.

728479431 is a `hidden beast` number, since 72 + 84 + 79 + 431 = 666.

It is not a de Polignac number, because 728479431 - 2¹ = 728479429 is a prime.

It is a super-2 number, since 2×728479431² = 1061364562780167522, which contains 22 as substring.

It is a congruent number.

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 (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5041 + ... + 38501.

It is an arithmetic number, because the mean of its divisors is an integer number (45675630).

Almost surely, 2^728479431 is an apocalyptic number.

728479431 is a deficient number, since it is larger than the sum of its proper divisors (367735689).

728479431 is a wasteful number, since it uses less digits than its factorization.

728479431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33567 (or 33564 counting only the distinct ones).

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

The square root of 728479431 is about 26990.3581117406. The cubic root of 728479431 is about 899.7857230619.

The spelling of 728479431 in words is "seven hundred twenty-eight million, four hundred seventy-nine thousand, four hundred thirty-one".