28125782 has 4 divisors (see below), whose sum is σ = 42188676. Its totient is φ = 14062890.

The previous prime is 28125781. The next prime is 28125793. The reversal of 28125782 is 28752182.

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

It is a super-2 number, since 2×28125782² = 1582119226223048, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28125781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7031444 + ... + 7031447.

It is an arithmetic number, because the mean of its divisors is an integer number (10547169).

Almost surely, 2^28125782 is an apocalyptic number.

28125782 is a deficient number, since it is larger than the sum of its proper divisors (14062894).

28125782 is a wasteful number, since it uses less digits than its factorization.

28125782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14062893.

The product of its digits is 17920, while the sum is 35.

The square root of 28125782 is about 5303.3745860537. The cubic root of 28125782 is about 304.1129182900.

The spelling of 28125782 in words is "twenty-eight million, one hundred twenty-five thousand, seven hundred eighty-two".