28440488144 has 20 divisors (see below), whose sum is σ = 55858289796. Its totient is φ = 14025445632.

The previous prime is 28440488119. The next prime is 28440488179. The reversal of 28440488144 is 44188404482.

It can be written as a sum of positive squares in 2 ways, for example, as 5566950544 + 22873537600 = 74612^2 + 151240^2 .

It is a super-2 number, since 2×28440488144² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12173699 + ... + 12176034.

Almost surely, 2^28440488144 is an apocalyptic number.

It is an amenable number.

28440488144 is a deficient number, since it is larger than the sum of its proper divisors (27417801652).

28440488144 is a wasteful number, since it uses less digits than its factorization.

28440488144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24349814 (or 24349808 counting only the distinct ones).

The product of its (nonzero) digits is 1048576, while the sum is 47.

The spelling of 28440488144 in words is "twenty-eight billion, four hundred forty million, four hundred eighty-eight thousand, one hundred forty-four".