28135379698 has 4 divisors (see below), whose sum is σ = 42203069550. Its totient is φ = 14067689848.

The previous prime is 28135379687. The next prime is 28135379707. The reversal of 28135379698 is 89697353182.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 15897931569 + 12237448129 = 126087^2 + 110623^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7033844923 + ... + 7033844926.

Almost surely, 2^28135379698 is an apocalyptic number.

28135379698 is a deficient number, since it is larger than the sum of its proper divisors (14067689852).

28135379698 is a wasteful number, since it uses less digits than its factorization.

28135379698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14067689851.

The product of its digits is 19595520, while the sum is 61.

The spelling of 28135379698 in words is "twenty-eight billion, one hundred thirty-five million, three hundred seventy-nine thousand, six hundred ninety-eight".