28963986 has 16 divisors (see below), whose sum is σ = 58346400. Its totient is φ = 9584928.

The previous prime is 28963967. The next prime is 28964009. The reversal of 28963986 is 68936982.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16531 + ... + 18198.

It is an arithmetic number, because the mean of its divisors is an integer number (3646650).

Almost surely, 2^28963986 is an apocalyptic number.

28963986 is an abundant number, since it is smaller than the sum of its proper divisors (29382414).

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

28963986 is a wasteful number, since it uses less digits than its factorization.

28963986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34873.

The product of its digits is 1119744, while the sum is 51.

The square root of 28963986 is about 5381.8199523953. The cubic root of 28963986 is about 307.1044500947.

The spelling of 28963986 in words is "twenty-eight million, nine hundred sixty-three thousand, nine hundred eighty-six".