28156326 has 16 divisors (see below), whose sum is σ = 61432128. Its totient is φ = 8532200.

The previous prime is 28156321. The next prime is 28156333. The reversal of 28156326 is 62365182.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28156321) 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 in 7 ways as a sum of consecutive naturals, for example, 213240 + ... + 213371.

It is an arithmetic number, because the mean of its divisors is an integer number (3839508).

Almost surely, 2^28156326 is an apocalyptic number.

28156326 is an abundant number, since it is smaller than the sum of its proper divisors (33275802).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28156326 is a wasteful number, since it uses less digits than its factorization.

28156326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426627.

The product of its digits is 17280, while the sum is 33.

The square root of 28156326 is about 5306.2534805642. The cubic root of 28156326 is about 304.2229651800. Note that the first 3 decimals are identical.

Subtracting 28156326 from its reverse (62365182), we obtain a triangular number (34208856 = T₈₂₇₁).

It can be divided in two parts, 28156 and 326, that added together give a palindrome (28482).

The spelling of 28156326 in words is "twenty-eight million, one hundred fifty-six thousand, three hundred twenty-six".