28713144 has 32 divisors (see below), whose sum is σ = 72159120. Its totient is φ = 9520896.

The previous prime is 28713143. The next prime is 28713169. The reversal of 28713144 is 44131782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28713143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1692 + ... + 7764.

Almost surely, 2^28713144 is an apocalyptic number.

28713144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28713144 is an abundant number, since it is smaller than the sum of its proper divisors (43445976).

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

28713144 is a wasteful number, since it uses less digits than its factorization.

28713144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6279 (or 6275 counting only the distinct ones).

The product of its digits is 5376, while the sum is 30.

The square root of 28713144 is about 5358.4647054917. The cubic root of 28713144 is about 306.2153211322.

It can be divided in two parts, 287 and 13144, that added together give a palindrome (13431).

The spelling of 28713144 in words is "twenty-eight million, seven hundred thirteen thousand, one hundred forty-four".