28181446 has 32 divisors (see below), whose sum is σ = 46656000. Its totient is φ = 12714912.

The previous prime is 28181429. The next prime is 28181453. The reversal of 28181446 is 64418182.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117795 + ... + 118033.

It is an arithmetic number, because the mean of its divisors is an integer number (1458000).

Almost surely, 2^28181446 is an apocalyptic number.

28181446 is a deficient number, since it is larger than the sum of its proper divisors (18474554).

28181446 is a wasteful number, since it uses less digits than its factorization.

28181446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396.

The product of its digits is 12288, while the sum is 34.

The square root of 28181446 is about 5308.6199713296. The cubic root of 28181446 is about 304.3134103296.

The spelling of 28181446 in words is "twenty-eight million, one hundred eighty-one thousand, four hundred forty-six".