40304285 has 16 divisors (see below), whose sum is σ = 56770176. Its totient is φ = 26889408.

The previous prime is 40304279. The next prime is 40304293. The reversal of 40304285 is 58240304.

It is not a de Polignac number, because 40304285 - 2⁴ = 40304269 is a prime.

It is a super-2 number, since 2×40304285² = 3248870778722450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14267 + ... + 16856.

It is an arithmetic number, because the mean of its divisors is an integer number (3548136).

Almost surely, 2^40304285 is an apocalyptic number.

It is an amenable number.

40304285 is a deficient number, since it is larger than the sum of its proper divisors (16465891).

40304285 is a wasteful number, since it uses less digits than its factorization.

40304285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31172.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 40304285 is about 6348.5655860202. The cubic root of 40304285 is about 342.8601996669.

Adding to 40304285 its reverse (58240304), we get a palindrome (98544589).

The spelling of 40304285 in words is "forty million, three hundred four thousand, two hundred eighty-five".