728867402 has 16 divisors (see below), whose sum is σ = 1104439752. Its totient is φ = 360729600.

The previous prime is 728867389. The next prime is 728867437. The reversal of 728867402 is 204768827.

It can be written as a sum of positive squares in 4 ways, for example, as 488896321 + 239971081 = 22111^2 + 15491^2 .

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, 219152 + ... + 222452.

Almost surely, 2^728867402 is an apocalyptic number.

728867402 is a deficient number, since it is larger than the sum of its proper divisors (375572350).

728867402 is a wasteful number, since it uses less digits than its factorization.

728867402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4393.

The product of its (nonzero) digits is 301056, while the sum is 44.

The square root of 728867402 is about 26997.5443698126. The cubic root of 728867402 is about 899.9454296131.

The spelling of 728867402 in words is "seven hundred twenty-eight million, eight hundred sixty-seven thousand, four hundred two".