28072254 has 32 divisors (see below), whose sum is σ = 65534976. Its totient is φ = 7849440.

The previous prime is 28072241. The next prime is 28072271. The reversal of 28072254 is 45227082.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5137 + ... + 9084.

It is an arithmetic number, because the mean of its divisors is an integer number (2047968).

Almost surely, 2^28072254 is an apocalyptic number.

28072254 is an abundant number, since it is smaller than the sum of its proper divisors (37462722).

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

28072254 is a wasteful number, since it uses less digits than its factorization.

28072254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14280.

The product of its (nonzero) digits is 8960, while the sum is 30.

The square root of 28072254 is about 5298.3255845597. The cubic root of 28072254 is about 303.9198700973.

The spelling of 28072254 in words is "twenty-eight million, seventy-two thousand, two hundred fifty-four".