28298726436 has 24 divisors (see below), whose sum is σ = 66137051680. Its totient is φ = 9417667392.

The previous prime is 28298726389. The next prime is 28298726447. The reversal of 28298726436 is 63462789282.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1897441 + ... + 1912296.

Almost surely, 2^28298726436 is an apocalyptic number.

It is an amenable number.

28298726436 is an abundant number, since it is smaller than the sum of its proper divisors (37838325244).

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

28298726436 is a wasteful number, since it uses less digits than its factorization.

28298726436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3810363 (or 3810361 counting only the distinct ones).

The product of its digits is 13934592, while the sum is 57.

The spelling of 28298726436 in words is "twenty-eight billion, two hundred ninety-eight million, seven hundred twenty-six thousand, four hundred thirty-six".