728013938 has 4 divisors (see below), whose sum is σ = 1092020910. Its totient is φ = 364006968.

The previous prime is 728013919. The next prime is 728013971. The reversal of 728013938 is 839310827.

728013938 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 431933089 + 296080849 = 20783^2 + 17207^2 .

It is a junction number, because it is equal to n+sod(n) for n = 728013895 and 728013904.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 182003483 + ... + 182003486.

Almost surely, 2^728013938 is an apocalyptic number.

728013938 is a deficient number, since it is larger than the sum of its proper divisors (364006972).

728013938 is a wasteful number, since it uses less digits than its factorization.

728013938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364006971.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 728013938 is about 26981.7334135522. The cubic root of 728013938 is about 899.5940300723.

The spelling of 728013938 in words is "seven hundred twenty-eight million, thirteen thousand, nine hundred thirty-eight".