28131586268 has 6 divisors (see below), whose sum is σ = 49230275976. Its totient is φ = 14065793132.

The previous prime is 28131586261. The next prime is 28131586279. The reversal of 28131586268 is 86268513182.

It is a super-2 number, since 2×28131586268² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28131586261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3516448280 + ... + 3516448287.

It is an arithmetic number, because the mean of its divisors is an integer number (8205045996).

Almost surely, 2^28131586268 is an apocalyptic number.

It is an amenable number.

28131586268 is a deficient number, since it is larger than the sum of its proper divisors (21098689708).

28131586268 is a wasteful number, since it uses less digits than its factorization.

28131586268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7032896571 (or 7032896569 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 50.

The spelling of 28131586268 in words is "twenty-eight billion, one hundred thirty-one million, five hundred eighty-six thousand, two hundred sixty-eight".