28453442 has 4 divisors (see below), whose sum is σ = 42680166. Its totient is φ = 14226720.

The previous prime is 28453433. The next prime is 28453459. The reversal of 28453442 is 24435482.

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

It can be written as a sum of positive squares in only one way, i.e., 17884441 + 10569001 = 4229^2 + 3251^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28453399 and 28453408.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7113359 + ... + 7113362.

Almost surely, 2^28453442 is an apocalyptic number.

28453442 is a deficient number, since it is larger than the sum of its proper divisors (14226724).

28453442 is a wasteful number, since it uses less digits than its factorization.

28453442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14226723.

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

The square root of 28453442 is about 5334.1767874715. The cubic root of 28453442 is about 305.2893142981.

The spelling of 28453442 in words is "twenty-eight million, four hundred fifty-three thousand, four hundred forty-two".