28941815 has 16 divisors (see below), whose sum is σ = 39889920. Its totient is φ = 19746720.

The previous prime is 28941779. The next prime is 28941823. The reversal of 28941815 is 51814982.

It is a de Polignac number, because none of the positive numbers 2^k-28941815 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5426 + ... + 9344.

It is an arithmetic number, because the mean of its divisors is an integer number (2493120).

Almost surely, 2^28941815 is an apocalyptic number.

28941815 is a deficient number, since it is larger than the sum of its proper divisors (10948105).

28941815 is a wasteful number, since it uses less digits than its factorization.

28941815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4142.

The product of its digits is 23040, while the sum is 38.

The square root of 28941815 is about 5379.7597530001. The cubic root of 28941815 is about 307.0260705649.

The spelling of 28941815 in words is "twenty-eight million, nine hundred forty-one thousand, eight hundred fifteen".