28365740 has 48 divisors (see below), whose sum is σ = 65009280. Its totient is φ = 10333440.

The previous prime is 28365731. The next prime is 28365773. The reversal of 28365740 is 4756382.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28365740.

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 15 ways as a sum of consecutive naturals, for example, 19850 + ... + 21230.

It is an arithmetic number, because the mean of its divisors is an integer number (1354360).

Almost surely, 2^28365740 is an apocalyptic number.

28365740 is a gapful number since it is divisible by the number (20) 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 28365740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32504640).

28365740 is an abundant number, since it is smaller than the sum of its proper divisors (36643540).

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

28365740 is a wasteful number, since it uses less digits than its factorization.

28365740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1482 (or 1480 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 28365740 is about 5325.9496805734. The cubic root of 28365740 is about 304.9753272167.

The spelling of 28365740 in words is "twenty-eight million, three hundred sixty-five thousand, seven hundred forty".