40142344 has 32 divisors (see below), whose sum is σ = 82425600. Its totient is φ = 18176320.

The previous prime is 40142341. The next prime is 40142353. The reversal of 40142344 is 44324104.

It is a super-2 number, since 2×40142344² = 3222815563628672, 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 (40142341) 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, 27177 + ... + 28615.

It is an arithmetic number, because the mean of its divisors is an integer number (2575800).

Almost surely, 2^40142344 is an apocalyptic number.

40142344 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

40142344 is an abundant number, since it is smaller than the sum of its proper divisors (42283256).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40142344 is a wasteful number, since it uses less digits than its factorization.

40142344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1773 (or 1769 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 40142344 is about 6335.7986079105. The cubic root of 40142344 is about 342.4003837667.

Adding to 40142344 its reverse (44324104), we get a palindrome (84466448).

The spelling of 40142344 in words is "forty million, one hundred forty-two thousand, three hundred forty-four".