28056138652 has 6 divisors (see below), whose sum is σ = 49098242648. Its totient is φ = 14028069324.

The previous prime is 28056138647. The next prime is 28056138659. The reversal of 28056138652 is 25683165082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28056138659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3507017328 + ... + 3507017335.

Almost surely, 2^28056138652 is an apocalyptic number.

It is an amenable number.

28056138652 is a deficient number, since it is larger than the sum of its proper divisors (21042103996).

28056138652 is a wasteful number, since it uses less digits than its factorization.

28056138652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7014034667 (or 7014034665 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 46.

The spelling of 28056138652 in words is "twenty-eight billion, fifty-six million, one hundred thirty-eight thousand, six hundred fifty-two".