28181326 has 8 divisors (see below), whose sum is σ = 42417144. Its totient is φ = 14042280.

The previous prime is 28181317. The next prime is 28181347. The reversal of 28181326 is 62318182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23460 + ... + 24631.

It is an arithmetic number, because the mean of its divisors is an integer number (5302143).

Almost surely, 2^28181326 is an apocalyptic number.

28181326 is a deficient number, since it is larger than the sum of its proper divisors (14235818).

28181326 is a wasteful number, since it uses less digits than its factorization.

28181326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48386.

The product of its digits is 4608, while the sum is 31.

The square root of 28181326 is about 5308.6086689452. The cubic root of 28181326 is about 304.3129783946.

The spelling of 28181326 in words is "twenty-eight million, one hundred eighty-one thousand, three hundred twenty-six".