28722196 has 6 divisors (see below), whose sum is σ = 50263850. Its totient is φ = 14361096.

The previous prime is 28722179. The next prime is 28722229. The reversal of 28722196 is 69122782.

It can be written as a sum of positive squares in only one way, i.e., 27248400 + 1473796 = 5220^2 + 1214^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3590271 + ... + 3590278.

Almost surely, 2^28722196 is an apocalyptic number.

It is an amenable number.

28722196 is a deficient number, since it is larger than the sum of its proper divisors (21541654).

28722196 is a wasteful number, since it uses less digits than its factorization.

28722196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7180553 (or 7180551 counting only the distinct ones).

The product of its digits is 24192, while the sum is 37.

The square root of 28722196 is about 5359.3092838537. The cubic root of 28722196 is about 306.2474965226.

The spelling of 28722196 in words is "twenty-eight million, seven hundred twenty-two thousand, one hundred ninety-six".