28215871015 has 8 divisors (see below), whose sum is σ = 33929735040. Its totient is φ = 22525570272.

The previous prime is 28215871009. The next prime is 28215871037. The reversal of 28215871015 is 51017851282.

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 28215871015 - 2⁵ = 28215870983 is a prime.

It is a super-2 number, since 2×28215871015² (a number of 22 digits) contains 22 as substring.

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, 5888184 + ... + 5892973.

It is an arithmetic number, because the mean of its divisors is an integer number (4241216880).

Almost surely, 2^28215871015 is an apocalyptic number.

28215871015 is a deficient number, since it is larger than the sum of its proper divisors (5713864025).

28215871015 is a wasteful number, since it uses less digits than its factorization.

28215871015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11781641.

The product of its (nonzero) digits is 44800, while the sum is 40.

The spelling of 28215871015 in words is "twenty-eight billion, two hundred fifteen million, eight hundred seventy-one thousand, fifteen".