18010240 has 64 divisors (see below), whose sum is σ = 43623360. Its totient is φ = 7109632.

The previous prime is 18010229. The next prime is 18010241. The reversal of 18010240 is 4201081.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (18010241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68349 + ... + 68611.

It is an arithmetic number, because the mean of its divisors is an integer number (681615).

Almost surely, 2^18010240 is an apocalyptic number.

18010240 is a gapful number since it is divisible by the number (10) 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 18010240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21811680).

18010240 is an abundant number, since it is smaller than the sum of its proper divisors (25613120).

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

18010240 is a wasteful number, since it uses less digits than its factorization.

18010240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389 (or 377 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 18010240 is about 4243.8473111082. The cubic root of 18010240 is about 262.1238270218.

The spelling of 18010240 in words is "eighteen million, ten thousand, two hundred forty".