28126699252 has 12 divisors (see below), whose sum is σ = 49232339296. Its totient is φ = 14060316600.

The previous prime is 28126699247. The next prime is 28126699277. The reversal of 28126699252 is 25299662182.

It is a super-2 number, since 2×28126699252² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28126699252.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 737328 + ... + 774535.

Almost surely, 2^28126699252 is an apocalyptic number.

It is an amenable number.

28126699252 is a deficient number, since it is larger than the sum of its proper divisors (21105640044).

28126699252 is a wasteful number, since it uses less digits than its factorization.

28126699252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1516518 (or 1516516 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 52.

The spelling of 28126699252 in words is "twenty-eight billion, one hundred twenty-six million, six hundred ninety-nine thousand, two hundred fifty-two".