39881289 has 8 divisors (see below), whose sum is σ = 60771520. Its totient is φ = 22789296.

The previous prime is 39881279. The next prime is 39881299. The reversal of 39881289 is 98218893.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (39881279) and next prime (39881299).

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

It is not a de Polignac number, because 39881289 - 2⁹ = 39880777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39881249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 949534 + ... + 949575.

It is an arithmetic number, because the mean of its divisors is an integer number (7596440).

Almost surely, 2^39881289 is an apocalyptic number.

It is an amenable number.

39881289 is a deficient number, since it is larger than the sum of its proper divisors (20890231).

39881289 is a wasteful number, since it uses less digits than its factorization.

39881289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1899119.

The product of its digits is 248832, while the sum is 48.

The square root of 39881289 is about 6315.1634183131. The cubic root of 39881289 is about 341.6565325040.

The spelling of 39881289 in words is "thirty-nine million, eight hundred eighty-one thousand, two hundred eighty-nine".