40222390 has 16 divisors (see below), whose sum is σ = 77969808. Its totient is φ = 14851296.

The previous prime is 40222387. The next prime is 40222397. The reversal of 40222390 is 9322204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40222397) 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, 154572 + ... + 154831.

It is an arithmetic number, because the mean of its divisors is an integer number (4873113).

Almost surely, 2^40222390 is an apocalyptic number.

40222390 is a deficient number, since it is larger than the sum of its proper divisors (37747418).

40222390 is a wasteful number, since it uses less digits than its factorization.

40222390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309423.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 40222390 is about 6342.1124241060. The cubic root of 40222390 is about 342.6278209400.

Adding to 40222390 its reverse (9322204), we get a palindrome (49544594).

The spelling of 40222390 in words is "forty million, two hundred twenty-two thousand, three hundred ninety".