28000144 has 10 divisors (see below), whose sum is σ = 54250310. Its totient is φ = 14000064.

The previous prime is 28000123. The next prime is 28000151. The reversal of 28000144 is 44100082.

It can be written as a sum of positive squares in only one way, i.e., 25401600 + 2598544 = 5040^2 + 1612^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 874989 + ... + 875020.

It is an arithmetic number, because the mean of its divisors is an integer number (5425031).

Almost surely, 2^28000144 is an apocalyptic number.

It is an amenable number.

28000144 is a deficient number, since it is larger than the sum of its proper divisors (26250166).

28000144 is a wasteful number, since it uses less digits than its factorization.

28000144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1750017 (or 1750011 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 28000144 is about 5291.5162288327. The cubic root of 28000144 is about 303.6594177448.

The spelling of 28000144 in words is "twenty-eight million, one hundred forty-four", and thus it is an aban number.