40239342 has 112 divisors (see below), whose sum is σ = 106869168. Its totient is φ = 11197440.

The previous prime is 40239337. The next prime is 40239347. The reversal of 40239342 is 24393204.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (40239337) and next prime (40239347).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40239347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 208398 + ... + 208590.

It is an arithmetic number, because the mean of its divisors is an integer number (954189).

Almost surely, 2^40239342 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40239342, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53434584).

40239342 is an abundant number, since it is smaller than the sum of its proper divisors (66629826).

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

40239342 is a wasteful number, since it uses less digits than its factorization.

40239342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237 (or 222 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 40239342 is about 6343.4487465416. The cubic root of 40239342 is about 342.6759484550.

The spelling of 40239342 in words is "forty million, two hundred thirty-nine thousand, three hundred forty-two".