28081146 has 32 divisors (see below), whose sum is σ = 57911616. Its totient is φ = 9072000.

The previous prime is 28081117. The next prime is 28081153. The reversal of 28081146 is 64118082.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51636 + ... + 52176.

It is an arithmetic number, because the mean of its divisors is an integer number (1809738).

Almost surely, 2^28081146 is an apocalyptic number.

28081146 is an abundant number, since it is smaller than the sum of its proper divisors (29830470).

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

28081146 is a wasteful number, since it uses less digits than its factorization.

28081146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798.

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 28081146 is about 5299.1646511502. The cubic root of 28081146 is about 303.9519559925.

The spelling of 28081146 in words is "twenty-eight million, eighty-one thousand, one hundred forty-six".