4039987 has 8 divisors (see below), whose sum is σ = 4638816. Its totient is φ = 3446592.

The previous prime is 4039967. The next prime is 4039991. The reversal of 4039987 is 7899304.

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 4039987 - 2¹¹ = 4037939 is a prime.

4039987 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4039957) by changing a digit.

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, 393 + ... + 2869.

It is an arithmetic number, because the mean of its divisors is an integer number (579852).

Almost surely, 2^4039987 is an apocalyptic number.

4039987 is a deficient number, since it is larger than the sum of its proper divisors (598829).

4039987 is a wasteful number, since it uses less digits than its factorization.

4039987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2717.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 4039987 is about 2009.9718903507. The cubic root of 4039987 is about 159.2673140041.

The spelling of 4039987 in words is "four million, thirty-nine thousand, nine hundred eighty-seven".