28479988 has 24 divisors (see below), whose sum is σ = 50654240. Its totient is φ = 14009760.

The previous prime is 28479961. The next prime is 28479989. The reversal of 28479988 is 88997482.

It is a super-2 number, since 2×28479988² = 1622219432960288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28479989) 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, 100495 + ... + 100777.

Almost surely, 2^28479988 is an apocalyptic number.

It is an amenable number.

28479988 is a deficient number, since it is larger than the sum of its proper divisors (22174252).

28479988 is a wasteful number, since it uses less digits than its factorization.

28479988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607 (or 605 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 55.

The square root of 28479988 is about 5336.6645013529. The cubic root of 28479988 is about 305.3842259686.

The spelling of 28479988 in words is "twenty-eight million, four hundred seventy-nine thousand, nine hundred eighty-eight".