28998015 has 16 divisors (see below), whose sum is σ = 46601568. Its totient is φ = 15397376.

The previous prime is 28998001. The next prime is 28998017. The reversal of 28998015 is 51089982.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 28998015 - 2⁷ = 28997887 is a prime.

It is a Smith number, since the sum of its digits (42) 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 not an unprimeable number, because it can be changed into a prime (28998017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 654 + ... + 7643.

It is an arithmetic number, because the mean of its divisors is an integer number (2912598).

Almost surely, 2^28998015 is an apocalyptic number.

28998015 is a deficient number, since it is larger than the sum of its proper divisors (17603553).

28998015 is a wasteful number, since it uses less digits than its factorization.

28998015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8538.

The product of its (nonzero) digits is 51840, while the sum is 42.

The square root of 28998015 is about 5384.9805013575. The cubic root of 28998015 is about 307.2246725823.

The spelling of 28998015 in words is "twenty-eight million, nine hundred ninety-eight thousand, fifteen".