28447157524 has 6 divisors (see below), whose sum is σ = 49782525674. Its totient is φ = 14223578760.

The previous prime is 28447157503. The next prime is 28447157549. The reversal of 28447157524 is 42575174482.

It can be written as a sum of positive squares in only one way, i.e., 28330949124 + 116208400 = 168318^2 + 10780^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3555894687 + ... + 3555894694.

Almost surely, 2^28447157524 is an apocalyptic number.

It is an amenable number.

28447157524 is a deficient number, since it is larger than the sum of its proper divisors (21335368150).

28447157524 is a wasteful number, since it uses less digits than its factorization.

28447157524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7111789385 (or 7111789383 counting only the distinct ones).

The product of its digits is 2508800, while the sum is 49.

The spelling of 28447157524 in words is "twenty-eight billion, four hundred forty-seven million, one hundred fifty-seven thousand, five hundred twenty-four".