28240574 has 8 divisors (see below), whose sum is σ = 44590440. Its totient is φ = 13377096.

The previous prime is 28240571. The next prime is 28240591. The reversal of 28240574 is 47504282.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 28240574.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28240571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 371549 + ... + 371624.

It is an arithmetic number, because the mean of its divisors is an integer number (5573805).

Almost surely, 2^28240574 is an apocalyptic number.

28240574 is a deficient number, since it is larger than the sum of its proper divisors (16349866).

28240574 is a wasteful number, since it uses less digits than its factorization.

28240574 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 743194.

The product of its (nonzero) digits is 17920, while the sum is 32.

The square root of 28240574 is about 5314.1861088976. The cubic root of 28240574 is about 304.5260901409.

The spelling of 28240574 in words is "twenty-eight million, two hundred forty thousand, five hundred seventy-four".