40212242 has 24 divisors (see below), whose sum is σ = 74296764. Its totient is φ = 16219392.

The previous prime is 40212209. The next prime is 40212251. The reversal of 40212242 is 24221204.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 37687321 + 2524921 = 6139^2 + 1589^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 40212242.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10403 + ... + 13734.

Almost surely, 2^40212242 is an apocalyptic number.

40212242 is a deficient number, since it is larger than the sum of its proper divisors (34084522).

40212242 is a wasteful number, since it uses less digits than its factorization.

40212242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24170 (or 24163 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 40212242 is about 6341.3123247479. The cubic root of 40212242 is about 342.5990038261.

Adding to 40212242 its reverse (24221204), we get a palindrome (64433446).

The spelling of 40212242 in words is "forty million, two hundred twelve thousand, two hundred forty-two".