40013842 has 16 divisors (see below), whose sum is σ = 65621664. Its totient is φ = 18148000.

The previous prime is 40013803. The next prime is 40013843. The reversal of 40013842 is 24831004.

It is a super-2 number, since 2×40013842² = 3202215103201928, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (40013843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9717 + ... + 13207.

It is an arithmetic number, because the mean of its divisors is an integer number (4101354).

Almost surely, 2^40013842 is an apocalyptic number.

40013842 is a deficient number, since it is larger than the sum of its proper divisors (25607822).

40013842 is a wasteful number, since it uses less digits than its factorization.

40013842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4025.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 40013842 is about 6325.6495318663. The cubic root of 40013842 is about 342.0346339308.

Adding to 40013842 its reverse (24831004), we get a palindrome (64844846).

The spelling of 40013842 in words is "forty million, thirteen thousand, eight hundred forty-two".