28875290 has 16 divisors (see below), whose sum is σ = 52634880. Its totient is φ = 11403600.

The previous prime is 28875289. The next prime is 28875293. The reversal of 28875290 is 9257882.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28875293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17486 + ... + 19065.

It is an arithmetic number, because the mean of its divisors is an integer number (3289680).

Almost surely, 2^28875290 is an apocalyptic number.

28875290 is a deficient number, since it is larger than the sum of its proper divisors (23759590).

28875290 is a wasteful number, since it uses less digits than its factorization.

28875290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36637.

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 28875290 is about 5373.5732990255. The cubic root of 28875290 is about 306.7906490387.

The spelling of 28875290 in words is "twenty-eight million, eight hundred seventy-five thousand, two hundred ninety".