39881361 has 32 divisors (see below), whose sum is σ = 60963840. Its totient is φ = 22987584.

The previous prime is 39881357. The next prime is 39881363. The reversal of 39881361 is 16318893.

It is not a de Polignac number, because 39881361 - 2² = 39881357 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (39881363) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 79036 + ... + 79538.

It is an arithmetic number, because the mean of its divisors is an integer number (1905120).

Almost surely, 2^39881361 is an apocalyptic number.

It is an amenable number.

39881361 is a deficient number, since it is larger than the sum of its proper divisors (21082479).

39881361 is a wasteful number, since it uses less digits than its factorization.

39881361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645.

The product of its digits is 31104, while the sum is 39.

The square root of 39881361 is about 6315.1691188756. The cubic root of 39881361 is about 341.6567381079.

The spelling of 39881361 in words is "thirty-nine million, eight hundred eighty-one thousand, three hundred sixty-one".