28387136615 has 8 divisors (see below), whose sum is σ = 34126842480. Its totient is φ = 22668190272.

The previous prime is 28387136587. The next prime is 28387136653. The reversal of 28387136615 is 51663178382.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28387136615 - 2¹⁶ = 28387071079 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5186870 + ... + 5192339.

It is an arithmetic number, because the mean of its divisors is an integer number (4265855310).

Almost surely, 2^28387136615 is an apocalyptic number.

28387136615 is a deficient number, since it is larger than the sum of its proper divisors (5739705865).

28387136615 is a wasteful number, since it uses less digits than its factorization.

28387136615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10379761.

The product of its digits is 1451520, while the sum is 50.

The spelling of 28387136615 in words is "twenty-eight billion, three hundred eighty-seven million, one hundred thirty-six thousand, six hundred fifteen".