28075215 has 32 divisors (see below), whose sum is σ = 52439040. Its totient is φ = 12559104.

The previous prime is 28075207. The next prime is 28075231. The reversal of 28075215 is 51257082.

It is not a de Polignac number, because 28075215 - 2³ = 28075207 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2091 + ... + 7779.

It is an arithmetic number, because the mean of its divisors is an integer number (1638720).

Almost surely, 2^28075215 is an apocalyptic number.

28075215 is a deficient number, since it is larger than the sum of its proper divisors (24363825).

28075215 is a wasteful number, since it uses less digits than its factorization.

28075215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5751.

The product of its (nonzero) digits is 5600, while the sum is 30.

The square root of 28075215 is about 5298.6050050933. The cubic root of 28075215 is about 303.9305553229.

The spelling of 28075215 in words is "twenty-eight million, seventy-five thousand, two hundred fifteen".