28900915 has 8 divisors (see below), whose sum is σ = 34710480. Its totient is φ = 23101152.

The previous prime is 28900913. The next prime is 28900939. The reversal of 28900915 is 51900982.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28900915 - 2¹ = 28900913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28900913) 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, 8481 + ... + 11389.

It is an arithmetic number, because the mean of its divisors is an integer number (4338810).

Almost surely, 2^28900915 is an apocalyptic number.

28900915 is a deficient number, since it is larger than the sum of its proper divisors (5809565).

28900915 is a wasteful number, since it uses less digits than its factorization.

28900915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4901.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 28900915 is about 5375.9571240850. The cubic root of 28900915 is about 306.8813746614.

The spelling of 28900915 in words is "twenty-eight million, nine hundred thousand, nine hundred fifteen".