28071974 has 16 divisors (see below), whose sum is σ = 49424928. Its totient is φ = 11705472.

The previous prime is 28071973. The next prime is 28071977. The reversal of 28071974 is 47917082.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28071973) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 26579 + ... + 27614.

It is an arithmetic number, because the mean of its divisors is an integer number (3089058).

Almost surely, 2^28071974 is an apocalyptic number.

28071974 is a deficient number, since it is larger than the sum of its proper divisors (21352954).

28071974 is a wasteful number, since it uses less digits than its factorization.

28071974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54239.

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

The square root of 28071974 is about 5298.2991610516. The cubic root of 28071974 is about 303.9188596352.

The spelling of 28071974 in words is "twenty-eight million, seventy-one thousand, nine hundred seventy-four".