28939226 has 4 divisors (see below), whose sum is σ = 43408842. Its totient is φ = 14469612.

The previous prime is 28939199. The next prime is 28939231. The reversal of 28939226 is 62293982.

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., 18705625 + 10233601 = 4325^2 + 3199^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7234805 + ... + 7234808.

Almost surely, 2^28939226 is an apocalyptic number.

28939226 is a deficient number, since it is larger than the sum of its proper divisors (14469616).

28939226 is a wasteful number, since it uses less digits than its factorization.

28939226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14469615.

The product of its digits is 93312, while the sum is 41.

The square root of 28939226 is about 5379.5191234905. The cubic root of 28939226 is about 307.0169152510.

The spelling of 28939226 in words is "twenty-eight million, nine hundred thirty-nine thousand, two hundred twenty-six".