40404481 has 16 divisors (see below), whose sum is σ = 45045504. Its totient is φ = 35999424.

The previous prime is 40404457. The next prime is 40404493. The reversal of 40404481 is 18440404.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 40404481 - 2⁹ = 40403969 is a prime.

It is a super-2 number, since 2×40404481² = 3265044169758722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40404781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80076 + ... + 80578.

It is an arithmetic number, because the mean of its divisors is an integer number (2815344).

Almost surely, 2^40404481 is an apocalyptic number.

It is an amenable number.

40404481 is a deficient number, since it is larger than the sum of its proper divisors (4641023).

40404481 is a wasteful number, since it uses less digits than its factorization.

40404481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720.

The product of its (nonzero) digits is 2048, while the sum is 25.

The square root of 40404481 is about 6356.4519191134. The cubic root of 40404481 is about 343.1440800911.

Adding to 40404481 its reverse (18440404), we get a palindrome (58844885).

The spelling of 40404481 in words is "forty million, four hundred four thousand, four hundred eighty-one".