40215985 has 8 divisors (see below), whose sum is σ = 48801960. Its totient is φ = 31810944.

The previous prime is 40215979. The next prime is 40215991. The reversal of 40215985 is 58951204.

40215985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (40215979) and next prime (40215991).

It can be written as a sum of positive squares in 4 ways, for example, as 1763584 + 38452401 = 1328^2 + 6201^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40215985 - 2¹³ = 40207793 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40215985.

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 7 ways as a sum of consecutive naturals, for example, 44742 + ... + 45631.

It is an arithmetic number, because the mean of its divisors is an integer number (6100245).

Almost surely, 2^40215985 is an apocalyptic number.

It is an amenable number.

40215985 is a deficient number, since it is larger than the sum of its proper divisors (8585975).

40215985 is an equidigital number, since it uses as much as digits as its factorization.

40215985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90467.

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 40215985 is about 6341.6074460660. The cubic root of 40215985 is about 342.6096333278.

The spelling of 40215985 in words is "forty million, two hundred fifteen thousand, nine hundred eighty-five".