40090942 has 4 divisors (see below), whose sum is σ = 60136416. Its totient is φ = 20045470.

The previous prime is 40090937. The next prime is 40090987. The reversal of 40090942 is 24909004.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 40090942.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10022734 + ... + 10022737.

It is an arithmetic number, because the mean of its divisors is an integer number (15034104).

Almost surely, 2^40090942 is an apocalyptic number.

40090942 is a deficient number, since it is larger than the sum of its proper divisors (20045474).

40090942 is a wasteful number, since it uses less digits than its factorization.

40090942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20045473.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 40090942 is about 6331.7408348731. The cubic root of 40090942 is about 342.2541742169.

Adding to 40090942 its reverse (24909004), we get a palindrome (64999946).

The spelling of 40090942 in words is "forty million, ninety thousand, nine hundred forty-two".