28702272 has 28 divisors (see below), whose sum is σ = 75941936. Its totient is φ = 9567360.

The previous prime is 28702253. The next prime is 28702277. The reversal of 28702272 is 27220782.

It is not an unprimeable number, because it can be changed into a prime (28702277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74554 + ... + 74937.

It is an arithmetic number, because the mean of its divisors is an integer number (2712212).

Almost surely, 2^28702272 is an apocalyptic number.

It is an amenable number.

28702272 is an abundant number, since it is smaller than the sum of its proper divisors (47239664).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28702272 is a wasteful number, since it uses less digits than its factorization.

28702272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149506 (or 149496 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 30.

The square root of 28702272 is about 5357.4501397587. The cubic root of 28702272 is about 306.1766676007.

The spelling of 28702272 in words is "twenty-eight million, seven hundred two thousand, two hundred seventy-two".