28728202 has 4 divisors (see below), whose sum is σ = 43092306. Its totient is φ = 14364100.

The previous prime is 28728197. The next prime is 28728211. The reversal of 28728202 is 20282782.

It is a happy number.

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., 14371681 + 14356521 = 3791^2 + 3789^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7182049 + ... + 7182052.

Almost surely, 2^28728202 is an apocalyptic number.

28728202 is a deficient number, since it is larger than the sum of its proper divisors (14364104).

28728202 is a wasteful number, since it uses less digits than its factorization.

28728202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14364103.

The product of its (nonzero) digits is 7168, while the sum is 31.

The square root of 28728202 is about 5359.8695879657. The cubic root of 28728202 is about 306.2688411565.

The spelling of 28728202 in words is "twenty-eight million, seven hundred twenty-eight thousand, two hundred two".