28243454 has 4 divisors (see below), whose sum is σ = 42365184. Its totient is φ = 14121726.

The previous prime is 28243451. The next prime is 28243483. The reversal of 28243454 is 45434282.

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

It is a self number, because there is not a number n which added to its sum of digits gives 28243454.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28243451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7060862 + ... + 7060865.

It is an arithmetic number, because the mean of its divisors is an integer number (10591296).

Almost surely, 2^28243454 is an apocalyptic number.

28243454 is a deficient number, since it is larger than the sum of its proper divisors (14121730).

28243454 is a wasteful number, since it uses less digits than its factorization.

28243454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14121729.

The product of its digits is 30720, while the sum is 32.

The square root of 28243454 is about 5314.4570748102. The cubic root of 28243454 is about 304.5364417403.

The spelling of 28243454 in words is "twenty-eight million, two hundred forty-three thousand, four hundred fifty-four".