28360144 has 20 divisors (see below), whose sum is σ = 56843460. Its totient is φ = 13690880.

The previous prime is 28360121. The next prime is 28360159. The reversal of 28360144 is 44106382.

28360144 = T₁₃₈₄ + T₁₃₈₅ + ... + T₁₄₁₂.

It can be written as a sum of positive squares in 2 ways, for example, as 5702544 + 22657600 = 2388^2 + 4760^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30097 + ... + 31024.

It is an arithmetic number, because the mean of its divisors is an integer number (2842173).

Almost surely, 2^28360144 is an apocalyptic number.

It is an amenable number.

28360144 is an abundant number, since it is smaller than the sum of its proper divisors (28483316).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28360144 is a wasteful number, since it uses less digits than its factorization.

28360144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61158 (or 61152 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 28360144 is about 5325.4243023444. The cubic root of 28360144 is about 304.9552706958.

The spelling of 28360144 in words is "twenty-eight million, three hundred sixty thousand, one hundred forty-four".