28970075 has 12 divisors (see below), whose sum is σ = 36894960. Its totient is φ = 22548960.

The previous prime is 28970021. The next prime is 28970077. The reversal of 28970075 is 57007982.

It is not a de Polignac number, because 28970075 - 2¹⁰ = 28969051 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28970077) 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 11 ways as a sum of consecutive naturals, for example, 14735 + ... + 16584.

It is an arithmetic number, because the mean of its divisors is an integer number (3074580).

Almost surely, 2^28970075 is an apocalyptic number.

28970075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28970075 is a deficient number, since it is larger than the sum of its proper divisors (7924885).

28970075 is a wasteful number, since it uses less digits than its factorization.

28970075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31366 (or 31361 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 38.

The square root of 28970075 is about 5382.3856234945. The cubic root of 28970075 is about 307.1259690938.

The spelling of 28970075 in words is "twenty-eight million, nine hundred seventy thousand, seventy-five".