39971442 has 32 divisors (see below), whose sum is σ = 92621952. Its totient is φ = 11263104.

The previous prime is 39971441. The next prime is 39971443. The reversal of 39971442 is 24417993.

39971442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (39971441) and next prime (39971443).

It is a self number, because there is not a number n which added to its sum of digits gives 39971442.

It is not an unprimeable number, because it can be changed into a prime (39971441) 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 15 ways as a sum of consecutive naturals, for example, 3453 + ... + 9584.

It is an arithmetic number, because the mean of its divisors is an integer number (2894436).

Almost surely, 2^39971442 is an apocalyptic number.

39971442 is an abundant number, since it is smaller than the sum of its proper divisors (52650510).

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

39971442 is a wasteful number, since it uses less digits than its factorization.

39971442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13122.

The product of its digits is 54432, while the sum is 39.

The square root of 39971442 is about 6322.2972090847. The cubic root of 39971442 is about 341.9137808032.

The spelling of 39971442 in words is "thirty-nine million, nine hundred seventy-one thousand, four hundred forty-two".