18240464 has 40 divisors (see below), whose sum is σ = 39208800. Its totient is φ = 8150400.

The previous prime is 18240463. The next prime is 18240479. The reversal of 18240464 is 46404281.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18240463) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 9887 + ... + 11585.

It is an arithmetic number, because the mean of its divisors is an integer number (980220).

Almost surely, 2^18240464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18240464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19604400).

18240464 is an abundant number, since it is smaller than the sum of its proper divisors (20968336).

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

18240464 is a wasteful number, since it uses less digits than its factorization.

18240464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1779 (or 1773 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 18240464 is about 4270.8856224441. The cubic root of 18240464 is about 263.2360066900.

The spelling of 18240464 in words is "eighteen million, two hundred forty thousand, four hundred sixty-four".