10818640 has 40 divisors (see below), whose sum is σ = 28748160. Its totient is φ = 3709056.

The previous prime is 10818637. The next prime is 10818641. The reversal of 10818640 is 4681801.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 10818599 and 10818608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10818641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9100 + ... + 10219.

It is an arithmetic number, because the mean of its divisors is an integer number (718704).

Almost surely, 2^10818640 is an apocalyptic number.

10818640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10818640 is an abundant number, since it is smaller than the sum of its proper divisors (17929520).

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

10818640 is a wasteful number, since it uses less digits than its factorization.

10818640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19339 (or 19333 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 10818640 is about 3289.1701080972. The cubic root of 10818640 is about 221.1689841375.

The spelling of 10818640 in words is "ten million, eight hundred eighteen thousand, six hundred forty".