40442115 has 32 divisors (see below), whose sum is σ = 74267136. Its totient is φ = 18408960.

The previous prime is 40442111. The next prime is 40442123. The reversal of 40442115 is 51124404.

It is a happy number.

It is not a de Polignac number, because 40442115 - 2² = 40442111 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 40442091 and 40442100.

It is not an unprimeable number, because it can be changed into a prime (40442111) 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, 29035 + ... + 30395.

It is an arithmetic number, because the mean of its divisors is an integer number (2320848).

Almost surely, 2^40442115 is an apocalyptic number.

40442115 is a deficient number, since it is larger than the sum of its proper divisors (33825021).

40442115 is a wasteful number, since it uses less digits than its factorization.

40442115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1659.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 40442115 is about 6359.4115293791. The cubic root of 40442115 is about 343.2505854143.

Adding to 40442115 its reverse (51124404), we get a palindrome (91566519).

The spelling of 40442115 in words is "forty million, four hundred forty-two thousand, one hundred fifteen".