28179745 has 16 divisors (see below), whose sum is σ = 37340352. Its totient is φ = 20244160.

The previous prime is 28179733. The next prime is 28179769. The reversal of 28179745 is 54797182.

It is not a de Polignac number, because 28179745 - 2⁷ = 28179617 is a prime.

It is a Duffinian 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, 1479 + ... + 7651.

It is an arithmetic number, because the mean of its divisors is an integer number (2333772).

Almost surely, 2^28179745 is an apocalyptic number.

It is an amenable number.

28179745 is a deficient number, since it is larger than the sum of its proper divisors (9160607).

28179745 is a wasteful number, since it uses less digits than its factorization.

28179745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6272.

The product of its digits is 141120, while the sum is 43.

The square root of 28179745 is about 5308.4597577829. The cubic root of 28179745 is about 304.3072875361.

The spelling of 28179745 in words is "twenty-eight million, one hundred seventy-nine thousand, seven hundred forty-five".