28064734436 has 6 divisors (see below), whose sum is σ = 49113285270. Its totient is φ = 14032367216.

The previous prime is 28064734381. The next prime is 28064734507. The reversal of 28064734436 is 63443746082.

It can be written as a sum of positive squares in only one way, i.e., 16985908900 + 11078825536 = 130330^2 + 105256^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3508091801 + ... + 3508091808.

It is an arithmetic number, because the mean of its divisors is an integer number (8185547545).

Almost surely, 2^28064734436 is an apocalyptic number.

It is an amenable number.

28064734436 is a deficient number, since it is larger than the sum of its proper divisors (21048550834).

28064734436 is a wasteful number, since it uses less digits than its factorization.

28064734436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7016183613 (or 7016183611 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 47.

The spelling of 28064734436 in words is "twenty-eight billion, sixty-four million, seven hundred thirty-four thousand, four hundred thirty-six".