28657605015 has 24 divisors (see below), whose sum is σ = 53494197120. Its totient is φ = 14108359104.

The previous prime is 28657605013. The next prime is 28657605043. The reversal of 28657605015 is 51050675682.

28657605015 is a `hidden beast` number, since 2 + 86 + 5 + 7 + 60 + 501 + 5 = 666.

It is not a de Polignac number, because 28657605015 - 2¹ = 28657605013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28657605013) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24493095 + ... + 24494264.

It is an arithmetic number, because the mean of its divisors is an integer number (2228924880).

Almost surely, 2^28657605015 is an apocalyptic number.

28657605015 is a deficient number, since it is larger than the sum of its proper divisors (24836592105).

28657605015 is a wasteful number, since it uses less digits than its factorization.

28657605015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48987383 (or 48987380 counting only the distinct ones).

The product of its (nonzero) digits is 504000, while the sum is 45.

The spelling of 28657605015 in words is "twenty-eight billion, six hundred fifty-seven million, six hundred five thousand, fifteen".