28371744 has 144 divisors (see below), whose sum is σ = 86486400. Its totient is φ = 8805888.

The previous prime is 28371737. The next prime is 28371779. The reversal of 28371744 is 44717382.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 28371699 and 28371708.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 359097 + ... + 359175.

It is an arithmetic number, because the mean of its divisors is an integer number (600600).

Almost surely, 2^28371744 is an apocalyptic number.

28371744 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28371744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43243200).

28371744 is an abundant number, since it is smaller than the sum of its proper divisors (58114656).

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

28371744 is a wasteful number, since it uses less digits than its factorization.

28371744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167 (or 156 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 28371744 is about 5326.5133060943. The cubic root of 28371744 is about 304.9968431098.

It can be divided in two parts, 283 and 71744, that added together give a palindrome (72027).

The spelling of 28371744 in words is "twenty-eight million, three hundred seventy-one thousand, seven hundred forty-four".