728937338 has 4 divisors (see below), whose sum is σ = 1093406010. Its totient is φ = 364468668.

The previous prime is 728937331. The next prime is 728937347. The reversal of 728937338 is 833739827.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 833739827 = 107 ⋅7791961.

It can be written as a sum of positive squares in only one way, i.e., 420127009 + 308810329 = 20497^2 + 17573^2 .

It is not an unprimeable number, because it can be changed into a prime (728937331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 182234333 + ... + 182234336.

Almost surely, 2^728937338 is an apocalyptic number.

728937338 is a deficient number, since it is larger than the sum of its proper divisors (364468672).

728937338 is a wasteful number, since it uses less digits than its factorization.

728937338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364468671.

The product of its digits is 1524096, while the sum is 50.

The square root of 728937338 is about 26998.8395676555. The cubic root of 728937338 is about 899.9742124298.

The spelling of 728937338 in words is "seven hundred twenty-eight million, nine hundred thirty-seven thousand, three hundred thirty-eight".