28381826 has 8 divisors (see below), whose sum is σ = 46443024. Its totient is φ = 12900820.

The previous prime is 28381819. The next prime is 28381831. The reversal of 28381826 is 62818382.

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

It is a self number, because there is not a number n which added to its sum of digits gives 28381826.

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, 645020 + ... + 645063.

It is an arithmetic number, because the mean of its divisors is an integer number (5805378).

Almost surely, 2^28381826 is an apocalyptic number.

28381826 is a deficient number, since it is larger than the sum of its proper divisors (18061198).

28381826 is a wasteful number, since it uses less digits than its factorization.

28381826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1290096.

The product of its digits is 36864, while the sum is 38.

The square root of 28381826 is about 5327.4596197437. The cubic root of 28381826 is about 305.0329660685.

It can be divided in two parts, 2838 and 1826, that added together give a palindrome (4664).

The spelling of 28381826 in words is "twenty-eight million, three hundred eighty-one thousand, eight hundred twenty-six".