40340020 has 48 divisors (see below), whose sum is σ = 99082368. Its totient is φ = 13507200.

The previous prime is 40340017. The next prime is 40340033. The reversal of 40340020 is 2004304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2670 + ... + 9370.

It is an arithmetic number, because the mean of its divisors is an integer number (2064216).

Almost surely, 2^40340020 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 40340020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49541184).

40340020 is an abundant number, since it is smaller than the sum of its proper divisors (58742348).

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

40340020 is a wasteful number, since it uses less digits than its factorization.

40340020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6760 (or 6758 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 40340020 is about 6351.3793777415. The cubic root of 40340020 is about 342.9614998139.

Adding to 40340020 its reverse (2004304), we get a palindrome (42344324).

The spelling of 40340020 in words is "forty million, three hundred forty thousand, twenty".