28081472752 has 20 divisors (see below), whose sum is σ = 54414657616. Its totient is φ = 14038980480.

The previous prime is 28081472723. The next prime is 28081472761. The reversal of 28081472752 is 25727418082.

It is a happy number.

It is a super-2 number, since 2×28081472752² (a number of 22 digits) contains 22 as substring.

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, 27388 + ... + 238564.

Almost surely, 2^28081472752 is an apocalyptic number.

It is an amenable number.

28081472752 is a deficient number, since it is larger than the sum of its proper divisors (26333184864).

28081472752 is a wasteful number, since it uses less digits than its factorization.

28081472752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219496 (or 219490 counting only the distinct ones).

The product of its (nonzero) digits is 501760, while the sum is 46.

The spelling of 28081472752 in words is "twenty-eight billion, eighty-one million, four hundred seventy-two thousand, seven hundred fifty-two".