18299040 has 96 divisors (see below), whose sum is σ = 58605120. Its totient is φ = 4798464.

The previous prime is 18299011. The next prime is 18299041. The reversal of 18299040 is 4099281.

It is a tau number, because it is divible by the number of its divisors (96).

It is a junction number, because it is equal to n+sod(n) for n = 18298992 and 18299010.

It is not an unprimeable number, because it can be changed into a prime (18299041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31876 + ... + 32444.

It is an arithmetic number, because the mean of its divisors is an integer number (610470).

Almost surely, 2^18299040 is an apocalyptic number.

18299040 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 18299040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29302560).

18299040 is an abundant number, since it is smaller than the sum of its proper divisors (40306080).

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

18299040 is a wasteful number, since it uses less digits than its factorization.

18299040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654 (or 646 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 18299040 is about 4277.7377198702. The cubic root of 18299040 is about 263.5174841103.

The spelling of 18299040 in words is "eighteen million, two hundred ninety-nine thousand, forty".