28250979 has 8 divisors (see below), whose sum is σ = 37712640. Its totient is φ = 18811656.

The previous prime is 28250977. The next prime is 28250987. The reversal of 28250979 is 97905282.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28250979 - 2¹ = 28250977 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28250979.

It is not an unprimeable number, because it can be changed into a prime (28250977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2367 + ... + 7880.

It is an arithmetic number, because the mean of its divisors is an integer number (4714080).

Almost surely, 2^28250979 is an apocalyptic number.

28250979 is a deficient number, since it is larger than the sum of its proper divisors (9461661).

28250979 is a wasteful number, since it uses less digits than its factorization.

28250979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11169.

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 28250979 is about 5315.1650021425. The cubic root of 28250979 is about 304.5634855671.

The spelling of 28250979 in words is "twenty-eight million, two hundred fifty thousand, nine hundred seventy-nine".