40442135 has 16 divisors (see below), whose sum is σ = 50561280. Its totient is φ = 31019520.

The previous prime is 40442131. The next prime is 40442141. The reversal of 40442135 is 53124404.

It is not a de Polignac number, because 40442135 - 2² = 40442131 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40442135.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40442131) 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, 16361 + ... + 18669.

It is an arithmetic number, because the mean of its divisors is an integer number (3160080).

Almost surely, 2^40442135 is an apocalyptic number.

40442135 is a deficient number, since it is larger than the sum of its proper divisors (10119145).

40442135 is a wasteful number, since it uses less digits than its factorization.

40442135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2458.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 40442135 is about 6359.4131018515. The cubic root of 40442135 is about 343.2506419973.

Adding to 40442135 its reverse (53124404), we get a palindrome (93566539).

The spelling of 40442135 in words is "forty million, four hundred forty-two thousand, one hundred thirty-five".