28881479 has 8 divisors (see below), whose sum is σ = 31862160. Its totient is φ = 25960000.

The previous prime is 28881473. The next prime is 28881493. The reversal of 28881479 is 97418882.

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

It is a de Polignac number, because none of the positive numbers 2^k-28881479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28881473) 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, 13772 + ... + 15729.

It is an arithmetic number, because the mean of its divisors is an integer number (3982770).

Almost surely, 2^28881479 is an apocalyptic number.

28881479 is a deficient number, since it is larger than the sum of its proper divisors (2980681).

28881479 is a wasteful number, since it uses less digits than its factorization.

28881479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29601.

The product of its digits is 258048, while the sum is 47.

The square root of 28881479 is about 5374.1491419573. The cubic root of 28881479 is about 306.8125661830.

The spelling of 28881479 in words is "twenty-eight million, eight hundred eighty-one thousand, four hundred seventy-nine".