28896438615 has 32 divisors (see below), whose sum is σ = 50479013376. Its totient is φ = 13998840960.

The previous prime is 28896438589. The next prime is 28896438671. The reversal of 28896438615 is 51683469882.

It is not a de Polignac number, because 28896438615 - 2⁸ = 28896438359 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 130197 + ... + 273393.

It is an arithmetic number, because the mean of its divisors is an integer number (1577469168).

Almost surely, 2^28896438615 is an apocalyptic number.

28896438615 is a deficient number, since it is larger than the sum of its proper divisors (21582574761).

28896438615 is a wasteful number, since it uses less digits than its factorization.

28896438615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144439.

The product of its digits is 19906560, while the sum is 60.

The spelling of 28896438615 in words is "twenty-eight billion, eight hundred ninety-six million, four hundred thirty-eight thousand, six hundred fifteen".