28051155672 has 32 divisors (see below), whose sum is σ = 73176929280. Its totient is φ = 8943846560.

The previous prime is 28051155661. The next prime is 28051155679. The reversal of 28051155672 is 27655115082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28051155679) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25408104 + ... + 25409207.

It is an arithmetic number, because the mean of its divisors is an integer number (2286779040).

Almost surely, 2^28051155672 is an apocalyptic number.

It is an amenable number.

28051155672 is an abundant number, since it is smaller than the sum of its proper divisors (45125773608).

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

28051155672 is a wasteful number, since it uses less digits than its factorization.

28051155672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50817343 (or 50817339 counting only the distinct ones).

The product of its (nonzero) digits is 168000, while the sum is 42.

The spelling of 28051155672 in words is "twenty-eight billion, fifty-one million, one hundred fifty-five thousand, six hundred seventy-two".