28279149 has 4 divisors (see below), whose sum is σ = 37705536. Its totient is φ = 18852764.

The previous prime is 28279117. The next prime is 28279151. The reversal of 28279149 is 94197282.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28279149 - 2⁵ = 28279117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28279149.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28279549) 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, 4713189 + ... + 4713194.

It is an arithmetic number, because the mean of its divisors is an integer number (9426384).

Almost surely, 2^28279149 is an apocalyptic number.

It is an amenable number.

28279149 is a deficient number, since it is larger than the sum of its proper divisors (9426387).

28279149 is an equidigital number, since it uses as much as digits as its factorization.

28279149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9426386.

The product of its digits is 72576, while the sum is 42.

The square root of 28279149 is about 5317.8143066489. The cubic root of 28279149 is about 304.6646820992.

The spelling of 28279149 in words is "twenty-eight million, two hundred seventy-nine thousand, one hundred forty-nine".