440042135 has 32 divisors (see below), whose sum is σ = 586692288. Its totient is φ = 314772480.

The previous prime is 440042111. The next prime is 440042137. The reversal of 440042135 is 531240044.

It is not a de Polignac number, because 440042135 - 2¹⁶ = 439976599 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 440042135.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440042137) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 433889 + ... + 434901.

It is an arithmetic number, because the mean of its divisors is an integer number (18334134).

Almost surely, 2^440042135 is an apocalyptic number.

440042135 is a deficient number, since it is larger than the sum of its proper divisors (146650153).

440042135 is a wasteful number, since it uses less digits than its factorization.

440042135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1235.

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

The square root of 440042135 is about 20977.1812930146. The cubic root of 440042135 is about 760.6147697716.

Adding to 440042135 its reverse (531240044), we get a palindrome (971282179).

The spelling of 440042135 in words is "four hundred forty million, forty-two thousand, one hundred thirty-five".