39873642 has 32 divisors (see below), whose sum is σ = 83827392. Its totient is φ = 12628224.

The previous prime is 39873641. The next prime is 39873661. The reversal of 39873642 is 24637893.

It is a junction number, because it is equal to n+sod(n) for n = 39873594 and 39873603.

It is not an unprimeable number, because it can be changed into a prime (39873641) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 7458 + ... + 11634.

It is an arithmetic number, because the mean of its divisors is an integer number (2619606).

Almost surely, 2^39873642 is an apocalyptic number.

39873642 is an abundant number, since it is smaller than the sum of its proper divisors (43953750).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

39873642 is a wasteful number, since it uses less digits than its factorization.

39873642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4262.

The product of its digits is 217728, while the sum is 42.

The square root of 39873642 is about 6314.5579417723. The cubic root of 39873642 is about 341.6346942387.

The spelling of 39873642 in words is "thirty-nine million, eight hundred seventy-three thousand, six hundred forty-two".