39442940 has 12 divisors (see below), whose sum is σ = 82830216. Its totient is φ = 15777168.

The previous prime is 39442937. The next prime is 39442951. The reversal of 39442940 is 4924493.

It is a self number, because there is not a number n which added to its sum of digits gives 39442940.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 986054 + ... + 986093.

It is an arithmetic number, because the mean of its divisors is an integer number (6902518).

Almost surely, 2^39442940 is an apocalyptic number.

It is an amenable number.

39442940 is an abundant number, since it is smaller than the sum of its proper divisors (43387276).

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

39442940 is a wasteful number, since it uses less digits than its factorization.

39442940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1972156 (or 1972154 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 39442940 is about 6280.3614545661. The cubic root of 39442940 is about 340.4001632143.

It can be divided in two parts, 394 and 42940, that added together give a palindrome (43334).

The spelling of 39442940 in words is "thirty-nine million, four hundred forty-two thousand, nine hundred forty".