28051394 has 32 divisors (see below), whose sum is σ = 52119936. Its totient is φ = 11047680.

The previous prime is 28051369. The next prime is 28051403. The reversal of 28051394 is 49315082.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28051394.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 8864 + ... + 11604.

It is an arithmetic number, because the mean of its divisors is an integer number (1628748).

Almost surely, 2^28051394 is an apocalyptic number.

28051394 is a deficient number, since it is larger than the sum of its proper divisors (24068542).

28051394 is a wasteful number, since it uses less digits than its factorization.

28051394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2810.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 28051394 is about 5296.3566722795. The cubic root of 28051394 is about 303.8445722669.

The spelling of 28051394 in words is "twenty-eight million, fifty-one thousand, three hundred ninety-four".