40143424 has 56 divisors (see below), whose sum is σ = 84490560. Its totient is φ = 18891264.

The previous prime is 40143403. The next prime is 40143437. The reversal of 40143424 is 42434104.

It is a super-2 number, since 2×40143424² = 3222988980887552, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40143395 and 40143404.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79557 + ... + 80059.

It is an arithmetic number, because the mean of its divisors is an integer number (1508760).

Almost surely, 2^40143424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40143424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42245280).

40143424 is an abundant number, since it is smaller than the sum of its proper divisors (44347136).

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

40143424 is a wasteful number, since it uses less digits than its factorization.

40143424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587 (or 577 counting only the distinct ones).

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

The square root of 40143424 is about 6335.8838373190. The cubic root of 40143424 is about 342.4034544153.

Adding to 40143424 its reverse (42434104), we get a palindrome (82577528).

The spelling of 40143424 in words is "forty million, one hundred forty-three thousand, four hundred twenty-four".