40004340 has 96 divisors (see below), whose sum is σ = 117694080. Its totient is φ = 10139136.

The previous prime is 40004333. The next prime is 40004351. The reversal of 40004340 is 4340004.

40004340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-4 number, since 4×40004340⁴ (a number of 32 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 144282 + ... + 144558.

It is an arithmetic number, because the mean of its divisors is an integer number (1225980).

Almost surely, 2^40004340 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40004340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58847040).

40004340 is an abundant number, since it is smaller than the sum of its proper divisors (77689740).

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

40004340 is a wasteful number, since it uses less digits than its factorization.

40004340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401 (or 399 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 40004340 is about 6324.8984181566. The cubic root of 40004340 is about 342.0075577140.

Adding to 40004340 its reverse (4340004), we get a palindrome (44344344).

The spelling of 40004340 in words is "forty million, four thousand, three hundred forty".