10218438 has 48 divisors (see below), whose sum is σ = 23178480. Its totient is φ = 3250368.

The previous prime is 10218433. The next prime is 10218449. The reversal of 10218438 is 83481201.

10218438 is a `hidden beast` number, since 10 + 218 + 438 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10218431) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44508 + ... + 44736.

It is an arithmetic number, because the mean of its divisors is an integer number (482885).

Almost surely, 2^10218438 is an apocalyptic number.

10218438 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 10218438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11589240).

10218438 is an abundant number, since it is smaller than the sum of its proper divisors (12960042).

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

10218438 is a wasteful number, since it uses less digits than its factorization.

10218438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341 (or 338 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 10218438 is about 3196.6291621019. The cubic root of 10218438 is about 217.0008848456. Note that the first 3 decimals are identical.

Adding to 10218438 its reverse (83481201), we get a palindrome (93699639).

The spelling of 10218438 in words is "ten million, two hundred eighteen thousand, four hundred thirty-eight".