28522986 has 8 divisors (see below), whose sum is σ = 57045984. Its totient is φ = 9507660.

The previous prime is 28522981. The next prime is 28522993. The reversal of 28522986 is 68922582.

It is a sphenic number, since it is the product of 3 distinct primes.

28522986 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28522981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2376910 + ... + 2376921.

It is an arithmetic number, because the mean of its divisors is an integer number (7130748).

Almost surely, 2^28522986 is an apocalyptic number.

28522986 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28522986 is a wasteful number, since it uses less digits than its factorization.

28522986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4753836.

The product of its digits is 138240, while the sum is 42.

The square root of 28522986 is about 5340.6915282574. The cubic root of 28522986 is about 305.5378345107.

The spelling of 28522986 in words is "twenty-eight million, five hundred twenty-two thousand, nine hundred eighty-six".