40405234 has 8 divisors (see below), whose sum is σ = 60895728. Its totient is φ = 20106660.

The previous prime is 40405231. The next prime is 40405237. The reversal of 40405234 is 43250404.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (40405231) and next prime (40405237).

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

It is not an unprimeable number, because it can be changed into a prime (40405231) 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 3 ways as a sum of consecutive naturals, for example, 47452 + ... + 48295.

It is an arithmetic number, because the mean of its divisors is an integer number (7611966).

Almost surely, 2^40405234 is an apocalyptic number.

40405234 is a deficient number, since it is larger than the sum of its proper divisors (20490494).

40405234 is a wasteful number, since it uses less digits than its factorization.

40405234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95960.

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 40405234 is about 6356.5111499942. The cubic root of 40405234 is about 343.1462117515.

Adding to 40405234 its reverse (43250404), we get a palindrome (83655638).

The spelling of 40405234 in words is "forty million, four hundred five thousand, two hundred thirty-four".