28078081292 has 6 divisors (see below), whose sum is σ = 49136642268. Its totient is φ = 14039040644.

The previous prime is 28078081279. The next prime is 28078081309. The reversal of 28078081292 is 29218087082.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3509760158 + ... + 3509760165.

It is an arithmetic number, because the mean of its divisors is an integer number (8189440378).

Almost surely, 2^28078081292 is an apocalyptic number.

It is an amenable number.

28078081292 is a deficient number, since it is larger than the sum of its proper divisors (21058560976).

28078081292 is a wasteful number, since it uses less digits than its factorization.

28078081292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7019520327 (or 7019520325 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 47.

The spelling of 28078081292 in words is "twenty-eight billion, seventy-eight million, eighty-one thousand, two hundred ninety-two".