28125574 has 4 divisors (see below), whose sum is σ = 42188364. Its totient is φ = 14062786.

The previous prime is 28125557. The next prime is 28125577. The reversal of 28125574 is 47552182.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28125577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7031392 + ... + 7031395.

It is an arithmetic number, because the mean of its divisors is an integer number (10547091).

Almost surely, 2^28125574 is an apocalyptic number.

28125574 is a deficient number, since it is larger than the sum of its proper divisors (14062790).

28125574 is a wasteful number, since it uses less digits than its factorization.

28125574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14062789.

The product of its digits is 22400, while the sum is 34.

The square root of 28125574 is about 5303.3549758620. The cubic root of 28125574 is about 304.1121686143.

The spelling of 28125574 in words is "twenty-eight million, one hundred twenty-five thousand, five hundred seventy-four".