39889965 has 8 divisors (see below), whose sum is σ = 63823968. Its totient is φ = 21274640.

The previous prime is 39889951. The next prime is 39889979. The reversal of 39889965 is 56998893.

It is an interprime number because it is at equal distance from previous prime (39889951) and next prime (39889979).

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

It is not a de Polignac number, because 39889965 - 2⁸ = 39889709 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1329651 + ... + 1329680.

It is an arithmetic number, because the mean of its divisors is an integer number (7977996).

Almost surely, 2^39889965 is an apocalyptic number.

It is an amenable number.

39889965 is a deficient number, since it is larger than the sum of its proper divisors (23934003).

39889965 is a wasteful number, since it uses less digits than its factorization.

39889965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2659339.

The product of its digits is 4199040, while the sum is 57.

The square root of 39889965 is about 6315.8502990492. The cubic root of 39889965 is about 341.6813060024.

The spelling of 39889965 in words is "thirty-nine million, eight hundred eighty-nine thousand, nine hundred sixty-five".