28277157248 has 32 divisors (see below), whose sum is σ = 56659070160. Its totient is φ = 14056841728.

The previous prime is 28277157199. The next prime is 28277157263. The reversal of 28277157248 is 84275177282.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 28277157248.

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, 616340 + ... + 660627.

Almost surely, 2^28277157248 is an apocalyptic number.

It is an amenable number.

28277157248 is an abundant number, since it is smaller than the sum of its proper divisors (28381912912).

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

28277157248 is a wasteful number, since it uses less digits than its factorization.

28277157248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1277154 (or 1277142 counting only the distinct ones).

The product of its digits is 3512320, while the sum is 53.

The spelling of 28277157248 in words is "twenty-eight billion, two hundred seventy-seven million, one hundred fifty-seven thousand, two hundred forty-eight".