28178144 has 24 divisors (see below), whose sum is σ = 55602288. Its totient is φ = 14056960.

The previous prime is 28178119. The next prime is 28178149. The reversal of 28178144 is 44187182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28178149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20024 + ... + 21384.

It is an arithmetic number, because the mean of its divisors is an integer number (2316762).

Almost surely, 2^28178144 is an apocalyptic number.

It is an amenable number.

28178144 is a deficient number, since it is larger than the sum of its proper divisors (27424144).

28178144 is a wasteful number, since it uses less digits than its factorization.

28178144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2018 (or 2010 counting only the distinct ones).

The product of its digits is 14336, while the sum is 35.

The square root of 28178144 is about 5308.3089586044. The cubic root of 28178144 is about 304.3015244701.

The spelling of 28178144 in words is "twenty-eight million, one hundred seventy-eight thousand, one hundred forty-four".