40042434 has 8 divisors (see below), whose sum is σ = 80084880. Its totient is φ = 13347476.

The previous prime is 40042427. The next prime is 40042441. The reversal of 40042434 is 43424004.

It is an interprime number because it is at equal distance from previous prime (40042427) and next prime (40042441).

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

40042434 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 40042434.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3336864 + ... + 3336875.

It is an arithmetic number, because the mean of its divisors is an integer number (10010610).

Almost surely, 2^40042434 is an apocalyptic number.

40042434 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.

40042434 is a wasteful number, since it uses less digits than its factorization.

40042434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6673744.

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 40042434 is about 6327.9091333552. The cubic root of 40042434 is about 342.1160817947.

Adding to 40042434 its reverse (43424004), we get a palindrome (83466438).

The spelling of 40042434 in words is "forty million, forty-two thousand, four hundred thirty-four".