28901397915 has 32 divisors (see below), whose sum is σ = 55332594240. Its totient is φ = 14228379648.

The previous prime is 28901397881. The next prime is 28901397989. The reversal of 28901397915 is 51979310982.

It is not a de Polignac number, because 28901397915 - 2⁷ = 28901397787 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8232262 + ... + 8235771.

It is an arithmetic number, because the mean of its divisors is an integer number (1729143570).

Almost surely, 2^28901397915 is an apocalyptic number.

28901397915 is a deficient number, since it is larger than the sum of its proper divisors (26431196325).

28901397915 is a wasteful number, since it uses less digits than its factorization.

28901397915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16468060 (or 16468054 counting only the distinct ones).

The product of its (nonzero) digits is 1224720, while the sum is 54.

The spelling of 28901397915 in words is "twenty-eight billion, nine hundred one million, three hundred ninety-seven thousand, nine hundred fifteen".