40143312 has 60 divisors (see below), whose sum is σ = 122563584. Its totient is φ = 12164160.

The previous prime is 40143289. The next prime is 40143317. The reversal of 40143312 is 21334104.

Added to its reverse (21334104) it gives a triangular number (61477416 = T₁₁₀₈₈).

It is a super-2 number, since 2×40143312² = 3222970996658688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40143317) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11088 + ... + 14255.

Almost surely, 2^40143312 is an apocalyptic number.

It is an amenable number.

40143312 is an abundant number, since it is smaller than the sum of its proper divisors (82420272).

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

40143312 is a wasteful number, since it uses less digits than its factorization.

40143312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25368 (or 25359 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 40143312 is about 6335.8749987669. The cubic root of 40143312 is about 342.4031359802.

Adding to 40143312 its reverse (21334104), we get a palindrome (61477416).

The spelling of 40143312 in words is "forty million, one hundred forty-three thousand, three hundred twelve".