40140342 has 24 divisors (see below), whose sum is σ = 94877640. Its totient is φ = 12163680.

The previous prime is 40140341. The next prime is 40140343. The reversal of 40140342 is 24304104.

It is an interprime number because it is at equal distance from previous prime (40140341) and next prime (40140343).

It is a super-3 number, since 3×40140342³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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 (40140341) 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, 101167 + ... + 101562.

It is an arithmetic number, because the mean of its divisors is an integer number (3953235).

Almost surely, 2^40140342 is an apocalyptic number.

40140342 is an abundant number, since it is smaller than the sum of its proper divisors (54737298).

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

40140342 is a wasteful number, since it uses less digits than its factorization.

40140342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202748 (or 202745 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 40140342 is about 6335.6406148076. The cubic root of 40140342 is about 342.3946915483.

Adding to 40140342 its reverse (24304104), we get a palindrome (64444446).

The spelling of 40140342 in words is "forty million, one hundred forty thousand, three hundred forty-two".