40222240 has 96 divisors (see below), whose sum is σ = 101787840. Its totient is φ = 14976000.

The previous prime is 40222223. The next prime is 40222249. The reversal of 40222240 is 4222204.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (40222249) 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, 306975 + ... + 307105.

It is an arithmetic number, because the mean of its divisors is an integer number (1060290).

Almost surely, 2^40222240 is an apocalyptic number.

40222240 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 40222240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50893920).

40222240 is an abundant number, since it is smaller than the sum of its proper divisors (61565600).

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

40222240 is a wasteful number, since it uses less digits than its factorization.

40222240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266 (or 258 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 40222240 is about 6342.1005983822. The cubic root of 40222240 is about 342.6273950227.

Adding to 40222240 its reverse (4222204), we get a palindrome (44444444).

The spelling of 40222240 in words is "forty million, two hundred twenty-two thousand, two hundred forty".