28018368 has 84 divisors (see below), whose sum is σ = 91795600. Its totient is φ = 8004096.

The previous prime is 28018343. The next prime is 28018387. The reversal of 28018368 is 86381082.

28018368 is a `hidden beast` number, since 280 + 18 + 368 = 666.

It is a tau number, because it is divible by the number of its divisors (84).

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

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 11 ways as a sum of consecutive naturals, for example, 558 + ... + 7506.

Almost surely, 2^28018368 is an apocalyptic number.

28018368 is a gapful number since it is divisible by the number (28) 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 28018368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45897800).

28018368 is an abundant number, since it is smaller than the sum of its proper divisors (63777232).

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

28018368 is a wasteful number, since it uses less digits than its factorization.

28018368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6974 (or 6961 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 28018368 is about 5293.2379504421. The cubic root of 28018368 is about 303.7252827522.

The spelling of 28018368 in words is "twenty-eight million, eighteen thousand, three hundred sixty-eight".