40290438 has 8 divisors (see below), whose sum is σ = 80580888. Its totient is φ = 13430144.

The previous prime is 40290409. The next prime is 40290463. The reversal of 40290438 is 83409204.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

40290438 is an admirable number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3357531 + ... + 3357542.

It is an arithmetic number, because the mean of its divisors is an integer number (10072611).

Almost surely, 2^40290438 is an apocalyptic number.

40290438 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

40290438 is a wasteful number, since it uses less digits than its factorization.

40290438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6715078.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 40290438 is about 6347.4749310257. The cubic root of 40290438 is about 342.8209306496.

The spelling of 40290438 in words is "forty million, two hundred ninety thousand, four hundred thirty-eight".