28760938 has 4 divisors (see below), whose sum is σ = 43141410. Its totient is φ = 14380468.

The previous prime is 28760929. The next prime is 28760981. The reversal of 28760938 is 83906782.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83906782 = 2 ⋅41953391.

It can be written as a sum of positive squares in only one way, i.e., 21594609 + 7166329 = 4647^2 + 2677^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28760894 and 28760903.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7190233 + ... + 7190236.

Almost surely, 2^28760938 is an apocalyptic number.

28760938 is a deficient number, since it is larger than the sum of its proper divisors (14380472).

28760938 is a wasteful number, since it uses less digits than its factorization.

28760938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14380471.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 28760938 is about 5362.9225241467. The cubic root of 28760938 is about 306.3851288721.

The spelling of 28760938 in words is "twenty-eight million, seven hundred sixty thousand, nine hundred thirty-eight".