40042442 has 8 divisors (see below), whose sum is σ = 65524032. Its totient is φ = 18201100.

The previous prime is 40042441. The next prime is 40042451. The reversal of 40042442 is 24424004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×40042442² = 3206794322646728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40042441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 910034 + ... + 910077.

It is an arithmetic number, because the mean of its divisors is an integer number (8190504).

Almost surely, 2^40042442 is an apocalyptic number.

40042442 is a deficient number, since it is larger than the sum of its proper divisors (25481590).

40042442 is a wasteful number, since it uses less digits than its factorization.

40042442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1820124.

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 40042442 is about 6327.9097654755. The cubic root of 40042442 is about 342.1161045783.

Adding to 40042442 its reverse (24424004), we get a palindrome (64466446).

It can be divided in two parts, 4004 and 2442, that added together give a palindrome (6446).

The spelling of 40042442 in words is "forty million, forty-two thousand, four hundred forty-two".