28879986 has 16 divisors (see below), whose sum is σ = 58291200. Its totient is φ = 9538128.

The previous prime is 28879979. The next prime is 28879987. The reversal of 28879986 is 68997882.

It is not an unprimeable number, because it can be changed into a prime (28879987) 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, 21426 + ... + 22733.

It is an arithmetic number, because the mean of its divisors is an integer number (3643200).

Almost surely, 2^28879986 is an apocalyptic number.

28879986 is an abundant number, since it is smaller than the sum of its proper divisors (29411214).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28879986 is a wasteful number, since it uses less digits than its factorization.

28879986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44273.

The product of its digits is 3483648, while the sum is 57.

The square root of 28879986 is about 5374.0102344525. The cubic root of 28879986 is about 306.8072792993.

The spelling of 28879986 in words is "twenty-eight million, eight hundred seventy-nine thousand, nine hundred eighty-six".