40407081 has 32 divisors (see below), whose sum is σ = 63866880. Its totient is φ = 22401600.

The previous prime is 40407077. The next prime is 40407083. The reversal of 40407081 is 18070404.

It is not a de Polignac number, because 40407081 - 2² = 40407077 is a prime.

It is a super-2 number, since 2×40407081² = 3265464389881122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40407083) 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, 55840 + ... + 56558.

It is an arithmetic number, because the mean of its divisors is an integer number (1995840).

Almost surely, 2^40407081 is an apocalyptic number.

It is an amenable number.

40407081 is a deficient number, since it is larger than the sum of its proper divisors (23459799).

40407081 is a wasteful number, since it uses less digits than its factorization.

40407081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 877.

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 40407081 is about 6356.6564324336. The cubic root of 40407081 is about 343.1514402935.

Adding to 40407081 its reverse (18070404), we get a palindrome (58477485).

The spelling of 40407081 in words is "forty million, four hundred seven thousand, eighty-one".