40005481 has 8 divisors (see below), whose sum is σ = 41070240. Its totient is φ = 38953728.

The previous prime is 40005479. The next prime is 40005541. The reversal of 40005481 is 18450004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40005481 - 2¹ = 40005479 is a prime.

It is a super-2 number, since 2×40005481² = 3200877020082722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40005281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3145 + ... + 9481.

It is an arithmetic number, because the mean of its divisors is an integer number (5133780).

Almost surely, 2^40005481 is an apocalyptic number.

It is an amenable number.

40005481 is a deficient number, since it is larger than the sum of its proper divisors (1064759).

40005481 is a wasteful number, since it uses less digits than its factorization.

40005481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6503.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 40005481 is about 6324.9886165905. The cubic root of 40005481 is about 342.0108092522.

Adding to 40005481 its reverse (18450004), we get a palindrome (58455485).

The spelling of 40005481 in words is "forty million, five thousand, four hundred eighty-one".