40115380 has 12 divisors (see below), whose sum is σ = 84242340. Its totient is φ = 16046144.

The previous prime is 40115371. The next prime is 40115389. The reversal of 40115380 is 8351104.

It is an interprime number because it is at equal distance from previous prime (40115371) and next prime (40115389).

It can be written as a sum of positive squares in 2 ways, for example, as 21123216 + 18992164 = 4596^2 + 4358^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40115389) 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 3 ways as a sum of consecutive naturals, for example, 1002865 + ... + 1002904.

It is an arithmetic number, because the mean of its divisors is an integer number (7020195).

Almost surely, 2^40115380 is an apocalyptic number.

It is an amenable number.

40115380 is an abundant number, since it is smaller than the sum of its proper divisors (44126960).

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

40115380 is a wasteful number, since it uses less digits than its factorization.

40115380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2005778 (or 2005776 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 40115380 is about 6333.6703419108. The cubic root of 40115380 is about 342.3237020471.

Adding to 40115380 its reverse (8351104), we get a palindrome (48466484).

The spelling of 40115380 in words is "forty million, one hundred fifteen thousand, three hundred eighty".