40315385 has 24 divisors (see below), whose sum is σ = 54643848. Its totient is φ = 28512000.

The previous prime is 40315277. The next prime is 40315391. The reversal of 40315385 is 58351304.

It can be written as a sum of positive squares in 4 ways, for example, as 4507129 + 35808256 = 2123^2 + 5984^2 .

It is not a de Polignac number, because 40315385 - 2⁸ = 40315129 is a prime.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21485 + ... + 23285.

It is an arithmetic number, because the mean of its divisors is an integer number (2276827).

Almost surely, 2^40315385 is an apocalyptic number.

It is an amenable number.

40315385 is a deficient number, since it is larger than the sum of its proper divisors (14328463).

40315385 is a wasteful number, since it uses less digits than its factorization.

40315385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1865 (or 1854 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 40315385 is about 6349.4397390636. The cubic root of 40315385 is about 342.8916719110.

Adding to 40315385 its reverse (58351304), we get a palindrome (98666689).

The spelling of 40315385 in words is "forty million, three hundred fifteen thousand, three hundred eighty-five".