28013774 has 4 divisors (see below), whose sum is σ = 42020664. Its totient is φ = 14006886.

The previous prime is 28013767. The next prime is 28013803. The reversal of 28013774 is 47731082.

It is a happy number.

It is a semiprime because it is the product of two primes.

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 28013774.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7003442 + ... + 7003445.

It is an arithmetic number, because the mean of its divisors is an integer number (10505166).

Almost surely, 2^28013774 is an apocalyptic number.

28013774 is a deficient number, since it is larger than the sum of its proper divisors (14006890).

28013774 is a wasteful number, since it uses less digits than its factorization.

28013774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14006889.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 28013774 is about 5292.8039827675. The cubic root of 28013774 is about 303.7086818541.

The spelling of 28013774 in words is "twenty-eight million, thirteen thousand, seven hundred seventy-four".