28125806776 has 16 divisors (see below), whose sum is σ = 52752369600. Its totient is φ = 14058508224.

The previous prime is 28125806773. The next prime is 28125806777. The reversal of 28125806776 is 67760852182.

It is a super-2 number, since 2×28125806776² (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 (28125806773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 522120 + ... + 573463.

It is an arithmetic number, because the mean of its divisors is an integer number (3297023100).

Almost surely, 2^28125806776 is an apocalyptic number.

It is an amenable number.

28125806776 is a deficient number, since it is larger than the sum of its proper divisors (24626562824).

28125806776 is a wasteful number, since it uses less digits than its factorization.

28125806776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1098798 (or 1098794 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 52.

The spelling of 28125806776 in words is "twenty-eight billion, one hundred twenty-five million, eight hundred six thousand, seven hundred seventy-six".