28274951 has 4 divisors (see below), whose sum is σ = 28932552. Its totient is φ = 27617352.

The previous prime is 28274941. The next prime is 28274989. The reversal of 28274951 is 15947282.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 28274951 - 2⁶ = 28274887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28274921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 328736 + ... + 328821.

It is an arithmetic number, because the mean of its divisors is an integer number (7233138).

Almost surely, 2^28274951 is an apocalyptic number.

28274951 is a deficient number, since it is larger than the sum of its proper divisors (657601).

28274951 is an equidigital number, since it uses as much as digits as its factorization.

28274951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657600.

The product of its digits is 40320, while the sum is 38.

The square root of 28274951 is about 5317.4195809622. The cubic root of 28274951 is about 304.6496056716.

The spelling of 28274951 in words is "twenty-eight million, two hundred seventy-four thousand, nine hundred fifty-one".