28109774 has 32 divisors (see below), whose sum is σ = 52932096. Its totient is φ = 10876320.

The previous prime is 28109771. The next prime is 28109779. The reversal of 28109774 is 47790182.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28109771) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25172 + ... + 26264.

It is an arithmetic number, because the mean of its divisors is an integer number (1654128).

Almost surely, 2^28109774 is an apocalyptic number.

28109774 is a deficient number, since it is larger than the sum of its proper divisors (24822322).

28109774 is a wasteful number, since it uses less digits than its factorization.

28109774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1280.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 28109774 is about 5301.8651435132. The cubic root of 28109774 is about 304.0552112902.

The spelling of 28109774 in words is "twenty-eight million, one hundred nine thousand, seven hundred seventy-four".