40290785 has 16 divisors (see below), whose sum is σ = 50229696. Its totient is φ = 31002048.

The previous prime is 40290769. The next prime is 40290827. The reversal of 40290785 is 58709204.

It is a happy number.

40290785 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 40290785 - 2⁴ = 40290769 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 13007 + ... + 15803.

It is an arithmetic number, because the mean of its divisors is an integer number (3139356).

Almost surely, 2^40290785 is an apocalyptic number.

It is an amenable number.

40290785 is a deficient number, since it is larger than the sum of its proper divisors (9938911).

40290785 is a wasteful number, since it uses less digits than its factorization.

40290785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2912.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 40290785 is about 6347.5022646707. The cubic root of 40290785 is about 342.8219148246.

Adding to 40290785 its reverse (58709204), we get a palindrome (98999989).

The spelling of 40290785 in words is "forty million, two hundred ninety thousand, seven hundred eighty-five".