40022442 has 12 divisors (see below), whose sum is σ = 86715330. Its totient is φ = 13340808.

The previous prime is 40022441. The next prime is 40022447. The reversal of 40022442 is 24422004.

40022442 is a `hidden beast` number, since 400 + 224 + 42 = 666.

It can be written as a sum of positive squares in only one way, i.e., 38303721 + 1718721 = 6189^2 + 1311^2 .

It is a super-3 number, since 3×40022442³ (a number of 24 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 2223469 = 40022442 / (4 + 0 + 0 + 2 + 2 + 4 + 4 + 2).

It is not an unprimeable number, because it can be changed into a prime (40022441) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1111717 + ... + 1111752.

Almost surely, 2^40022442 is an apocalyptic number.

40022442 is an abundant number, since it is smaller than the sum of its proper divisors (46692888).

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

40022442 is a wasteful number, since it uses less digits than its factorization.

40022442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2223477 (or 2223474 counting only the distinct ones).

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

The square root of 40022442 is about 6326.3292674346. The cubic root of 40022442 is about 342.0591361780.

Adding to 40022442 its reverse (24422004), we get a palindrome (64444446).

The spelling of 40022442 in words is "forty million, twenty-two thousand, four hundred forty-two".