28157326 has 4 divisors (see below), whose sum is σ = 42235992. Its totient is φ = 14078662.

The previous prime is 28157323. The next prime is 28157357. The reversal of 28157326 is 62375182.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 28157291 and 28157300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28157323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7039330 + ... + 7039333.

It is an arithmetic number, because the mean of its divisors is an integer number (10558998).

Almost surely, 2^28157326 is an apocalyptic number.

28157326 is a deficient number, since it is larger than the sum of its proper divisors (14078666).

28157326 is a wasteful number, since it uses less digits than its factorization.

28157326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14078665.

The product of its digits is 20160, while the sum is 34.

The square root of 28157326 is about 5306.3477081699. The cubic root of 28157326 is about 304.2265667314.

The spelling of 28157326 in words is "twenty-eight million, one hundred fifty-seven thousand, three hundred twenty-six".