28381974 has 16 divisors (see below), whose sum is σ = 56972208. Its totient is φ = 9425952.

The previous prime is 28381973. The next prime is 28382017. The reversal of 28381974 is 47918382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28381973) 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, 6877 + ... + 10200.

It is an arithmetic number, because the mean of its divisors is an integer number (3560763).

Almost surely, 2^28381974 is an apocalyptic number.

28381974 is an abundant number, since it is smaller than the sum of its proper divisors (28590234).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28381974 is a wasteful number, since it uses less digits than its factorization.

28381974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17359.

The product of its digits is 96768, while the sum is 42.

The square root of 28381974 is about 5327.4735100233. The cubic root of 28381974 is about 305.0334962764.

The spelling of 28381974 in words is "twenty-eight million, three hundred eighty-one thousand, nine hundred seventy-four".