40516240 has 40 divisors (see below), whose sum is σ = 95618880. Its totient is φ = 15962496.

The previous prime is 40516213. The next prime is 40516247. The reversal of 40516240 is 4261504.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (40516247) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1581 + ... + 9139.

It is an arithmetic number, because the mean of its divisors is an integer number (2390472).

Almost surely, 2^40516240 is an apocalyptic number.

40516240 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 40516240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47809440).

40516240 is an abundant number, since it is smaller than the sum of its proper divisors (55102640).

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

40516240 is a wasteful number, since it uses less digits than its factorization.

40516240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7639 (or 7633 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 40516240 is about 6365.2368376990. The cubic root of 40516240 is about 343.4601682599.

Adding to 40516240 its reverse (4261504), we get a palindrome (44777744).

The spelling of 40516240 in words is "forty million, five hundred sixteen thousand, two hundred forty".