40343040 has 240 divisors, whose sum is σ = 149374368. Its totient is φ = 10027008.

The previous prime is 40343033. The next prime is 40343047. The reversal of 40343040 is 4034304.

It is an interprime number because it is at equal distance from previous prime (40343033) and next prime (40343047).

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40343047) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 391629 + ... + 391731.

Almost surely, 2^40343040 is an apocalyptic number.

40343040 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 40343040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74687184).

40343040 is an abundant number, since it is smaller than the sum of its proper divisors (109031328).

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

40343040 is a wasteful number, since it uses less digits than its factorization.

40343040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149 (or 130 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 40343040 is about 6351.6171169238. The cubic root of 40343040 is about 342.9700580470.

Adding to 40343040 its reverse (4034304), we get a palindrome (44377344).

The spelling of 40343040 in words is "forty million, three hundred forty-three thousand, forty".