40288481 has 8 divisors (see below), whose sum is σ = 40992744. Its totient is φ = 39588480.

The previous prime is 40288459. The next prime is 40288483. The reversal of 40288481 is 18488204.

It can be written as a sum of positive squares in 4 ways, for example, as 1960000 + 38328481 = 1400^2 + 6191^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40288481 is a prime.

It is a super-2 number, since 2×40288481² = 3246323402574722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40288483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22271 + ... + 24011.

It is an arithmetic number, because the mean of its divisors is an integer number (5124093).

Almost surely, 2^40288481 is an apocalyptic number.

It is an amenable number.

40288481 is a deficient number, since it is larger than the sum of its proper divisors (704263).

40288481 is a wasteful number, since it uses less digits than its factorization.

40288481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2131.

The product of its (nonzero) digits is 16384, while the sum is 35.

The square root of 40288481 is about 6347.3207733657. The cubic root of 40288481 is about 342.8153800239.

The spelling of 40288481 in words is "forty million, two hundred eighty-eight thousand, four hundred eighty-one".