8040438 has 64 divisors (see below), whose sum is σ = 20736000. Its totient is φ = 2261952.

The previous prime is 8040437. The next prime is 8040443. The reversal of 8040438 is 8340408.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8040437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33523 + ... + 33761.

It is an arithmetic number, because the mean of its divisors is an integer number (324000).

Almost surely, 2^8040438 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8040438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10368000).

8040438 is an abundant number, since it is smaller than the sum of its proper divisors (12695562).

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

8040438 is a wasteful number, since it uses less digits than its factorization.

8040438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346 (or 340 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 8040438 is about 2835.5666100446. The cubic root of 8040438 is about 200.3364171336.

The spelling of 8040438 in words is "eight million, forty thousand, four hundred thirty-eight".