28079985 has 16 divisors (see below), whose sum is σ = 44997120. Its totient is φ = 14952960.

The previous prime is 28079977. The next prime is 28079993. The reversal of 28079985 is 58997082.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28079977) and next prime (28079993).

It is not a de Polignac number, because 28079985 - 2³ = 28079977 is a prime.

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, 13921 + ... + 15809.

It is an arithmetic number, because the mean of its divisors is an integer number (2812320).

Almost surely, 2^28079985 is an apocalyptic number.

It is an amenable number.

28079985 is a deficient number, since it is larger than the sum of its proper divisors (16917135).

28079985 is a wasteful number, since it uses less digits than its factorization.

28079985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2888.

The product of its (nonzero) digits is 362880, while the sum is 48.

The square root of 28079985 is about 5299.0551044502. The cubic root of 28079985 is about 303.9477670243.

The spelling of 28079985 in words is "twenty-eight million, seventy-nine thousand, nine hundred eighty-five".