28135316736 has 144 divisors (see below), whose sum is σ = 87580494400. Its totient is φ = 8884795392.

The previous prime is 28135316719. The next prime is 28135316801. The reversal of 28135316736 is 63761353182.

28135316736 is a `hidden beast` number, since 2 + 81 + 3 + 531 + 6 + 7 + 36 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a junction number, because it is equal to n+sod(n) for n = 28135316691 and 28135316700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24210 + ... + 238446.

Almost surely, 2^28135316736 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28135316736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43790247200).

28135316736 is an abundant number, since it is smaller than the sum of its proper divisors (59445177664).

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

28135316736 is a wasteful number, since it uses less digits than its factorization.

28135316736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214281 (or 214261 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The spelling of 28135316736 in words is "twenty-eight billion, one hundred thirty-five million, three hundred sixteen thousand, seven hundred thirty-six".