28037008681 has 8 divisors (see below), whose sum is σ = 30625610400. Its totient is φ = 25455037440.

The previous prime is 28037008631. The next prime is 28037008691. The reversal of 28037008681 is 18680073082.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28037008681 - 2⁷ = 28037008553 is a prime.

It is a super-2 number, since 2×28037008681² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28037008631) 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, 1648771 + ... + 1665688.

It is an arithmetic number, because the mean of its divisors is an integer number (3828201300).

Almost surely, 2^28037008681 is an apocalyptic number.

It is an amenable number.

28037008681 is a deficient number, since it is larger than the sum of its proper divisors (2588601719).

28037008681 is a wasteful number, since it uses less digits than its factorization.

28037008681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3315239.

The product of its (nonzero) digits is 129024, while the sum is 43.

The spelling of 28037008681 in words is "twenty-eight billion, thirty-seven million, eight thousand, six hundred eighty-one".