40013860 has 12 divisors (see below), whose sum is σ = 84029148. Its totient is φ = 16005536.

The previous prime is 40013843. The next prime is 40013863. The reversal of 40013860 is 6831004.

It can be written as a sum of positive squares in 2 ways, for example, as 18335524 + 21678336 = 4282^2 + 4656^2 .

It is a super-2 number, since 2×40013860² = 3202217984199200, which contains 22 as substring.

40013860 is a modest number, since divided by 13860 gives 40 as remainder.

It is not an unprimeable number, because it can be changed into a prime (40013863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1000327 + ... + 1000366.

It is an arithmetic number, because the mean of its divisors is an integer number (7002429).

Almost surely, 2^40013860 is an apocalyptic number.

It is an amenable number.

40013860 is an abundant number, since it is smaller than the sum of its proper divisors (44015288).

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

40013860 is a wasteful number, since it uses less digits than its factorization.

40013860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2000702 (or 2000700 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 40013860 is about 6325.6509546449. The cubic root of 40013860 is about 342.0346852183.

Adding to 40013860 its reverse (6831004), we get a palindrome (46844864).

The spelling of 40013860 in words is "forty million, thirteen thousand, eight hundred sixty".