40392481 has 2 divisors, whose sum is σ = 40392482. Its totient is φ = 40392480.

The previous prime is 40392467. The next prime is 40392509. The reversal of 40392481 is 18429304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37699600 + 2692881 = 6140^2 + 1641^2 .

It is a cyclic number.

It is not a de Polignac number, because 40392481 - 2⁷ = 40392353 is a prime.

It is a super-4 number, since 4×40392481⁴ (a number of 32 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (40392281) 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 as a sum of consecutive naturals, namely, 20196240 + 20196241.

It is an arithmetic number, because the mean of its divisors is an integer number (20196241).

Almost surely, 2^40392481 is an apocalyptic number.

It is an amenable number.

40392481 is a deficient number, since it is larger than the sum of its proper divisors (1).

40392481 is an equidigital number, since it uses as much as digits as its factorization.

40392481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 40392481 is about 6355.5079262007. The cubic root of 40392481 is about 343.1101058340.

The spelling of 40392481 in words is "forty million, three hundred ninety-two thousand, four hundred eighty-one".