28991082 has 16 divisors (see below), whose sum is σ = 58121280. Its totient is φ = 9640512.

The previous prime is 28991071. The next prime is 28991087. The reversal of 28991082 is 28019982.

It is a self number, because there is not a number n which added to its sum of digits gives 28991082.

It is not an unprimeable number, because it can be changed into a prime (28991087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2982 + ... + 8177.

It is an arithmetic number, because the mean of its divisors is an integer number (3632580).

Almost surely, 2^28991082 is an apocalyptic number.

28991082 is an abundant number, since it is smaller than the sum of its proper divisors (29130198).

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

28991082 is a wasteful number, since it uses less digits than its factorization.

28991082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11597.

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 28991082 is about 5384.3367279545. The cubic root of 28991082 is about 307.2001863267.

The spelling of 28991082 in words is "twenty-eight million, nine hundred ninety-one thousand, eighty-two".