40143372 has 48 divisors (see below), whose sum is σ = 100407552. Its totient is φ = 12450240.

The previous prime is 40143347. The next prime is 40143373. The reversal of 40143372 is 27334104.

It is a super-2 number, since 2×40143372² = 3222980631060768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40143373) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8247 + ... + 12177.

It is an arithmetic number, because the mean of its divisors is an integer number (2091824).

Almost surely, 2^40143372 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 40143372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50203776).

40143372 is an abundant number, since it is smaller than the sum of its proper divisors (60264180).

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

40143372 is a wasteful number, since it uses less digits than its factorization.

40143372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3998 (or 3996 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 40143372 is about 6335.8797337071. The cubic root of 40143372 is about 342.4033065705.

Adding to 40143372 its reverse (27334104), we get a palindrome (67477476).

The spelling of 40143372 in words is "forty million, one hundred forty-three thousand, three hundred seventy-two".