728042024 has 8 divisors (see below), whose sum is σ = 1365078810. Its totient is φ = 364021008.

The previous prime is 728042009. The next prime is 728042059. The reversal of 728042024 is 420240827.

It can be written as a sum of positive squares in only one way, i.e., 523036900 + 205005124 = 22870^2 + 14318^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45502619 + ... + 45502634.

Almost surely, 2^728042024 is an apocalyptic number.

It is an amenable number.

728042024 is a deficient number, since it is larger than the sum of its proper divisors (637036786).

728042024 is a wasteful number, since it uses less digits than its factorization.

728042024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91005259 (or 91005255 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 29.

The square root of 728042024 is about 26982.2538717580. The cubic root of 728042024 is about 899.6055983824.

The spelling of 728042024 in words is "seven hundred twenty-eight million, forty-two thousand, twenty-four".