40042494 has 36 divisors (see below), whose sum is σ = 90822888. Its totient is φ = 12726120.

The previous prime is 40042469. The next prime is 40042553. The reversal of 40042494 is 49424004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 128599 + ... + 128909.

It is an arithmetic number, because the mean of its divisors is an integer number (2522858).

Almost surely, 2^40042494 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40042494, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45411444).

40042494 is an abundant number, since it is smaller than the sum of its proper divisors (50780394).

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

40042494 is a wasteful number, since it uses less digits than its factorization.

40042494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653 (or 339 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 40042494 is about 6327.9138742559. The cubic root of 40042494 is about 342.1162526714.

Adding to 40042494 its reverse (49424004), we get a palindrome (89466498).

The spelling of 40042494 in words is "forty million, forty-two thousand, four hundred ninety-four".