40291505 has 12 divisors (see below), whose sum is σ = 48848436. Its totient is φ = 31903200.

The previous prime is 40291499. The next prime is 40291507. The reversal of 40291505 is 50519204.

40291505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 5387041 + 34904464 = 2321^2 + 5908^2 .

It is not a de Polignac number, because 40291505 - 2⁶ = 40291441 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40291507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 190850 + ... + 191060.

It is an arithmetic number, because the mean of its divisors is an integer number (4070703).

Almost surely, 2^40291505 is an apocalyptic number.

It is an amenable number.

40291505 is a deficient number, since it is larger than the sum of its proper divisors (8556931).

40291505 is an equidigital number, since it uses as much as digits as its factorization.

40291505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608 (or 397 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 40291505 is about 6347.5589796393. The cubic root of 40291505 is about 342.8239568987.

The spelling of 40291505 in words is "forty million, two hundred ninety-one thousand, five hundred five".