918422140 has 48 divisors (see below), whose sum is σ = 2029192704. Its totient is φ = 348710400.

The previous prime is 918422129. The next prime is 918422147. The reversal of 918422140 is 41224819.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (918422147) 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, 15205 + ... + 45475.

It is an arithmetic number, because the mean of its divisors is an integer number (42274848).

Almost surely, 2^918422140 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 918422140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1014596352).

918422140 is an abundant number, since it is smaller than the sum of its proper divisors (1110770564).

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

918422140 is a wasteful number, since it uses less digits than its factorization.

918422140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30358 (or 30356 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 918422140 is about 30305.4803624691. The cubic root of 918422140 is about 972.0324902912.

Adding to 918422140 its reverse (41224819), we get a palindrome (959646959).

The spelling of 918422140 in words is "nine hundred eighteen million, four hundred twenty-two thousand, one hundred forty".