40011081 has 32 divisors (see below), whose sum is σ = 62529408. Its totient is φ = 22487040.

The previous prime is 40011077. The next prime is 40011089. The reversal of 40011081 is 18011004.

It is not a de Polignac number, because 40011081 - 2² = 40011077 is a prime.

It is a super-3 number, since 3×40011081³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 40011081.

It is not an unprimeable number, because it can be changed into a prime (40011089) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40465 + ... + 41441.

It is an arithmetic number, because the mean of its divisors is an integer number (1954044).

Almost surely, 2^40011081 is an apocalyptic number.

It is an amenable number.

40011081 is a deficient number, since it is larger than the sum of its proper divisors (22518327).

40011081 is a wasteful number, since it uses less digits than its factorization.

40011081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1081.

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 40011081 is about 6325.4312896434. The cubic root of 40011081 is about 342.0267668254.

Adding to 40011081 its reverse (18011004), we get a palindrome (58022085).

The spelling of 40011081 in words is "forty million, eleven thousand, eighty-one".