28158528236 has 6 divisors (see below), whose sum is σ = 49277424420. Its totient is φ = 14079264116.

The previous prime is 28158528193. The next prime is 28158528253. The reversal of 28158528236 is 63282585182.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3519816026 + ... + 3519816033.

It is an arithmetic number, because the mean of its divisors is an integer number (8212904070).

Almost surely, 2^28158528236 is an apocalyptic number.

It is an amenable number.

28158528236 is a deficient number, since it is larger than the sum of its proper divisors (21118896184).

28158528236 is a wasteful number, since it uses less digits than its factorization.

28158528236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7039632063 (or 7039632061 counting only the distinct ones).

The product of its digits is 1843200, while the sum is 50.

The spelling of 28158528236 in words is "twenty-eight billion, one hundred fifty-eight million, five hundred twenty-eight thousand, two hundred thirty-six".