40515020 has 96 divisors (see below), whose sum is σ = 106178688. Its totient is φ = 12644352.

The previous prime is 40514993. The next prime is 40515023. The reversal of 40515020 is 2051504.

40515020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 40515020.

It is not an unprimeable number, because it can be changed into a prime (40515023) 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 31 ways as a sum of consecutive naturals, for example, 205562 + ... + 205758.

It is an arithmetic number, because the mean of its divisors is an integer number (1106028).

Almost surely, 2^40515020 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 40515020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53089344).

40515020 is an abundant number, since it is smaller than the sum of its proper divisors (65663668).

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

40515020 is a wasteful number, since it uses less digits than its factorization.

40515020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339 (or 337 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 40515020 is about 6365.1410039370. The cubic root of 40515020 is about 343.4567208718.

Adding to 40515020 its reverse (2051504), we get a palindrome (42566524).

The spelling of 40515020 in words is "forty million, five hundred fifteen thousand, twenty".