28948915 has 8 divisors (see below), whose sum is σ = 34921728. Its totient is φ = 23037120.

The previous prime is 28948883. The next prime is 28948921. The reversal of 28948915 is 51984982.

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

It is not a de Polignac number, because 28948915 - 2⁵ = 28948883 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14202 + ... + 16111.

It is an arithmetic number, because the mean of its divisors is an integer number (4365216).

Almost surely, 2^28948915 is an apocalyptic number.

28948915 is a deficient number, since it is larger than the sum of its proper divisors (5972813).

28948915 is a wasteful number, since it uses less digits than its factorization.

28948915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30509.

The product of its digits is 207360, while the sum is 46.

The square root of 28948915 is about 5380.4195933031. The cubic root of 28948915 is about 307.0511750359.

The spelling of 28948915 in words is "twenty-eight million, nine hundred forty-eight thousand, nine hundred fifteen".