28032986 has 4 divisors (see below), whose sum is σ = 42049482. Its totient is φ = 14016492.

The previous prime is 28032973. The next prime is 28033007. The reversal of 28032986 is 68923082.

It is a happy number.

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., 27931225 + 101761 = 5285^2 + 319^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7008245 + ... + 7008248.

Almost surely, 2^28032986 is an apocalyptic number.

28032986 is a deficient number, since it is larger than the sum of its proper divisors (14016496).

28032986 is a wasteful number, since it uses less digits than its factorization.

28032986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14016495.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 28032986 is about 5294.6185887182. The cubic root of 28032986 is about 303.7780943492.

The spelling of 28032986 in words is "twenty-eight million, thirty-two thousand, nine hundred eighty-six".