28879147 has 8 divisors (see below), whose sum is σ = 31574592. Its totient is φ = 26195400.

The previous prime is 28879139. The next prime is 28879153. The reversal of 28879147 is 74197882.

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

It is not a de Polignac number, because 28879147 - 2³ = 28879139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28879097 and 28879106.

It is not an unprimeable number, because it can be changed into a prime (28879177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2728 + ... + 8074.

It is an arithmetic number, because the mean of its divisors is an integer number (3946824).

Almost surely, 2^28879147 is an apocalyptic number.

28879147 is a deficient number, since it is larger than the sum of its proper divisors (2695445).

28879147 is a wasteful number, since it uses less digits than its factorization.

28879147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5849.

The product of its digits is 225792, while the sum is 46.

The square root of 28879147 is about 5373.9321729996. The cubic root of 28879147 is about 306.8043082245.

The spelling of 28879147 in words is "twenty-eight million, eight hundred seventy-nine thousand, one hundred forty-seven".