40004985 has 16 divisors (see below), whose sum is σ = 64143360. Its totient is φ = 21290880.

The previous prime is 40004977. The next prime is 40004999. The reversal of 40004985 is 58940004.

It is not a de Polignac number, because 40004985 - 2³ = 40004977 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5256 + ... + 10374.

It is an arithmetic number, because the mean of its divisors is an integer number (4008960).

Almost surely, 2^40004985 is an apocalyptic number.

It is an amenable number.

40004985 is a deficient number, since it is larger than the sum of its proper divisors (24138375).

40004985 is a wasteful number, since it uses less digits than its factorization.

40004985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5648.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 40004985 is about 6324.9494069123. The cubic root of 40004985 is about 342.0093957954.

Adding to 40004985 its reverse (58940004), we get a palindrome (98944989).

The spelling of 40004985 in words is "forty million, four thousand, nine hundred eighty-five".