28135638276 has 24 divisors (see below), whose sum is σ = 66299823744. Its totient is φ = 9285688800.

The previous prime is 28135638241. The next prime is 28135638281. The reversal of 28135638276 is 67283653182.

It is a happy number.

It is a super-2 number, since 2×28135638276² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11605900 + ... + 11608323.

It is an arithmetic number, because the mean of its divisors is an integer number (2762492656).

Almost surely, 2^28135638276 is an apocalyptic number.

It is an amenable number.

28135638276 is an abundant number, since it is smaller than the sum of its proper divisors (38164185468).

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

28135638276 is a wasteful number, since it uses less digits than its factorization.

28135638276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23214331 (or 23214329 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 51.

The spelling of 28135638276 in words is "twenty-eight billion, one hundred thirty-five million, six hundred thirty-eight thousand, two hundred seventy-six".