28073131256 has 32 divisors (see below), whose sum is σ = 56346624000. Its totient is φ = 13072408416.

The previous prime is 28073131211. The next prime is 28073131277. The reversal of 28073131256 is 65213137082.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1556216 + ... + 1574151.

It is an arithmetic number, because the mean of its divisors is an integer number (1760832000).

Almost surely, 2^28073131256 is an apocalyptic number.

It is an amenable number.

28073131256 is an abundant number, since it is smaller than the sum of its proper divisors (28273492744).

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

28073131256 is a wasteful number, since it uses less digits than its factorization.

28073131256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3130451 (or 3130447 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 38.

The spelling of 28073131256 in words is "twenty-eight billion, seventy-three million, one hundred thirty-one thousand, two hundred fifty-six".