28021046 has 16 divisors (see below), whose sum is σ = 42591744. Its totient is φ = 13825344.

The previous prime is 28021033. The next prime is 28021051. The reversal of 28021046 is 64012082.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72971 + ... + 73353.

It is an arithmetic number, because the mean of its divisors is an integer number (2661984).

Almost surely, 2^28021046 is an apocalyptic number.

28021046 is a deficient number, since it is larger than the sum of its proper divisors (14570698).

28021046 is a wasteful number, since it uses less digits than its factorization.

28021046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 28021046 is about 5293.4909086538. The cubic root of 28021046 is about 303.7349591473.

The spelling of 28021046 in words is "twenty-eight million, twenty-one thousand, forty-six".