28988832826 has 4 divisors (see below), whose sum is σ = 43483249242. Its totient is φ = 14494416412.

The previous prime is 28988832793. The next prime is 28988832833. The reversal of 28988832826 is 62823888982.

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., 17346207025 + 11642625801 = 131705^2 + 107901^2 .

It is a super-2 number, since 2×28988832826² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7247208205 + ... + 7247208208.

Almost surely, 2^28988832826 is an apocalyptic number.

28988832826 is a deficient number, since it is larger than the sum of its proper divisors (14494416416).

28988832826 is a wasteful number, since it uses less digits than its factorization.

28988832826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14494416415.

The product of its digits is 42467328, while the sum is 64.

The spelling of 28988832826 in words is "twenty-eight billion, nine hundred eighty-eight million, eight hundred thirty-two thousand, eight hundred twenty-six".