28157867526 has 16 divisors (see below), whose sum is σ = 56948497200. Its totient is φ = 9280495488.

The previous prime is 28157867501. The next prime is 28157867527. The reversal of 28157867526 is 62576875182.

It is a super-2 number, since 2×28157867526² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28157867527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26364511 + ... + 26365578.

It is an arithmetic number, because the mean of its divisors is an integer number (3559281075).

Almost surely, 2^28157867526 is an apocalyptic number.

28157867526 is an abundant number, since it is smaller than the sum of its proper divisors (28790629674).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28157867526 is a wasteful number, since it uses less digits than its factorization.

28157867526 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52730183.

The product of its digits is 11289600, while the sum is 57.

The spelling of 28157867526 in words is "twenty-eight billion, one hundred fifty-seven million, eight hundred sixty-seven thousand, five hundred twenty-six".