40288081 has 2 divisors, whose sum is σ = 40288082. Its totient is φ = 40288080.

The previous prime is 40288051. The next prime is 40288097. The reversal of 40288081 is 18088204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22648081 + 17640000 = 4759^2 + 4200^2 .

It is a cyclic number.

It is not a de Polignac number, because 40288081 - 2¹¹ = 40286033 is a prime.

It is a super-2 number, since 2×40288081² = 3246258941325122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40288021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20144040 + 20144041.

It is an arithmetic number, because the mean of its divisors is an integer number (20144041).

Almost surely, 2^40288081 is an apocalyptic number.

It is an amenable number.

40288081 is a deficient number, since it is larger than the sum of its proper divisors (1).

40288081 is an equidigital number, since it uses as much as digits as its factorization.

40288081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4096, while the sum is 31.

The square root of 40288081 is about 6347.2892639299. The cubic root of 40288081 is about 342.8142454845.

The spelling of 40288081 in words is "forty million, two hundred eighty-eight thousand, eighty-one".