28578260028615 has 32 divisors (see below), whose sum is σ = 50032755032832. Its totient is φ = 13814264640000.

The previous prime is 28578260028611. The next prime is 28578260028641. The reversal of 28578260028615 is 51682006287582.

It is a happy number.

It is not a de Polignac number, because 28578260028615 - 2² = 28578260028611 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28578260028611) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 261579186 + ... + 261688415.

It is an arithmetic number, because the mean of its divisors is an integer number (1563523594776).

Almost surely, 2^{28578260028615} is an apocalyptic number.

28578260028615 is a deficient number, since it is larger than the sum of its proper divisors (21454495004217).

28578260028615 is a wasteful number, since it uses less digits than its factorization.

28578260028615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523267951.

The product of its (nonzero) digits is 25804800, while the sum is 60.

The spelling of 28578260028615 in words is "twenty-eight trillion, five hundred seventy-eight billion, two hundred sixty million, twenty-eight thousand, six hundred fifteen".