40340520 has 192 divisors, whose sum is σ = 146240640. Its totient is φ = 9561600.

The previous prime is 40340513. The next prime is 40340543. The reversal of 40340520 is 2504304.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 40340493 and 40340502.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 241477 + ... + 241643.

It is an arithmetic number, because the mean of its divisors is an integer number (761670).

Almost surely, 2^40340520 is an apocalyptic number.

40340520 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 40340520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73120320).

40340520 is an abundant number, since it is smaller than the sum of its proper divisors (105900120).

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

40340520 is a wasteful number, since it uses less digits than its factorization.

40340520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256 (or 249 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 40340520 is about 6351.4187391480. The cubic root of 40340520 is about 342.9629167694.

Adding to 40340520 its reverse (2504304), we get a palindrome (42844824).

The spelling of 40340520 in words is "forty million, three hundred forty thousand, five hundred twenty".