40334640 has 80 divisors (see below), whose sum is σ = 130491648. Its totient is φ = 10286848.

The previous prime is 40334639. The next prime is 40334641. The reversal of 40334640 is 4643304.

40334640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (40334639) and next prime (40334641).

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 40334640.

It is not an unprimeable number, because it can be changed into a prime (40334641) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1867 + ... + 9173.

Almost surely, 2^40334640 is an apocalyptic number.

40334640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40334640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65245824).

40334640 is an abundant number, since it is smaller than the sum of its proper divisors (90157008).

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

40334640 is a wasteful number, since it uses less digits than its factorization.

40334640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7346 (or 7340 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 40334640 is about 6350.9558335734. The cubic root of 40334640 is about 342.9462526317.

Adding to 40334640 its reverse (4643304), we get a palindrome (44977944).

The spelling of 40334640 in words is "forty million, three hundred thirty-four thousand, six hundred forty".