28785627215 has 16 divisors (see below), whose sum is σ = 35846664480. Its totient is φ = 22164240000.

The previous prime is 28785627197. The next prime is 28785627223. The reversal of 28785627215 is 51272658782.

It is not a de Polignac number, because 28785627215 - 2⁸ = 28785626959 is a prime.

It is a super-2 number, since 2×28785627215² (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 15 ways as a sum of consecutive naturals, for example, 267161 + ... + 359090.

It is an arithmetic number, because the mean of its divisors is an integer number (2240416530).

Almost surely, 2^28785627215 is an apocalyptic number.

28785627215 is a deficient number, since it is larger than the sum of its proper divisors (7061037265).

28785627215 is a wasteful number, since it uses less digits than its factorization.

28785627215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626602.

The product of its digits is 3763200, while the sum is 53.

The spelling of 28785627215 in words is "twenty-eight billion, seven hundred eighty-five million, six hundred twenty-seven thousand, two hundred fifteen".