28370986 has 16 divisors (see below), whose sum is σ = 49671936. Its totient is φ = 11900016.

The previous prime is 28370981. The next prime is 28370987. The reversal of 28370986 is 68907382.

It is a super-2 number, since 2×28370986² = 1609825693224392, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28370981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20901 + ... + 22216.

It is an arithmetic number, because the mean of its divisors is an integer number (3104496).

Almost surely, 2^28370986 is an apocalyptic number.

28370986 is a deficient number, since it is larger than the sum of its proper divisors (21300950).

28370986 is a wasteful number, since it uses less digits than its factorization.

28370986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43173.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 28370986 is about 5326.4421521312. The cubic root of 28370986 is about 304.9941269137.

The spelling of 28370986 in words is "twenty-eight million, three hundred seventy thousand, nine hundred eighty-six".