28137986124 has 12 divisors (see below), whose sum is σ = 65655300984. Its totient is φ = 9379328704.

The previous prime is 28137986119. The next prime is 28137986161. The reversal of 28137986124 is 42168973182.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×28137986124² (a number of 22 digits) contains 22 as substring.

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, 1172416077 + ... + 1172416100.

It is an arithmetic number, because the mean of its divisors is an integer number (5471275082).

Almost surely, 2^28137986124 is an apocalyptic number.

It is an amenable number.

28137986124 is an abundant number, since it is smaller than the sum of its proper divisors (37517314860).

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

28137986124 is a wasteful number, since it uses less digits than its factorization.

28137986124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2344832184 (or 2344832182 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 51.

The spelling of 28137986124 in words is "twenty-eight billion, one hundred thirty-seven million, nine hundred eighty-six thousand, one hundred twenty-four".