40123985 has 8 divisors (see below), whose sum is σ = 52526016. Its totient is φ = 29181040.

The previous prime is 40123949. The next prime is 40124009. The reversal of 40123985 is 58932104.

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

It is not a de Polignac number, because 40123985 - 2⁸ = 40123729 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 364709 + ... + 364818.

It is an arithmetic number, because the mean of its divisors is an integer number (6565752).

Almost surely, 2^40123985 is an apocalyptic number.

It is an amenable number.

40123985 is a deficient number, since it is larger than the sum of its proper divisors (12402031).

40123985 is a wasteful number, since it uses less digits than its factorization.

40123985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729543.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 40123985 is about 6334.3496114439. The cubic root of 40123985 is about 342.3481771558.

It can be divided in two parts, 4012 and 3985, that added together give a palindrome (7997).

The spelling of 40123985 in words is "forty million, one hundred twenty-three thousand, nine hundred eighty-five".