40283985 has 16 divisors (see below), whose sum is σ = 73662336. Its totient is φ = 18415488.

The previous prime is 40283963. The next prime is 40283989. The reversal of 40283985 is 58938204.

It is a happy number.

It is not a de Polignac number, because 40283985 - 2⁶ = 40283921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40283989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 191724 + ... + 191933.

It is an arithmetic number, because the mean of its divisors is an integer number (4603896).

Almost surely, 2^40283985 is an apocalyptic number.

It is an amenable number.

40283985 is a deficient number, since it is larger than the sum of its proper divisors (33378351).

40283985 is a wasteful number, since it uses less digits than its factorization.

40283985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383672.

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 40283985 is about 6346.9665983051. The cubic root of 40283985 is about 342.8026273690.

The spelling of 40283985 in words is "forty million, two hundred eighty-three thousand, nine hundred eighty-five".