40422240 has 120 divisors (see below), whose sum is σ = 142702560. Its totient is φ = 10775808.

The previous prime is 40422229. The next prime is 40422251. The reversal of 40422240 is 4222404.

40422240 is a `hidden beast` number, since 4 + 0 + 422 + 240 = 666.

It is an interprime number because it is at equal distance from previous prime (40422229) and next prime (40422251).

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a zygodrome in base 3.

It is a congruent number.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 11401 + ... + 14519.

It is an arithmetic number, because the mean of its divisors is an integer number (1189188).

Almost surely, 2^40422240 is an apocalyptic number.

40422240 is a gapful number since it is divisible by the number (40) 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 40422240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71351280).

40422240 is an abundant number, since it is smaller than the sum of its proper divisors (102280320).

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

40422240 is a wasteful number, since it uses less digits than its factorization.

40422240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3146 (or 3129 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 40422240 is about 6357.8486927576. The cubic root of 40422240 is about 343.1943468187.

Adding to 40422240 its reverse (4222404), we get a palindrome (44644644).

The spelling of 40422240 in words is "forty million, four hundred twenty-two thousand, two hundred forty".