39193940 has 12 divisors (see below), whose sum is σ = 82307316. Its totient is φ = 15677568.

The previous prime is 39193933. The next prime is 39193949. The reversal of 39193940 is 4939193.

It can be written as a sum of positive squares in 2 ways, for example, as 5692996 + 33500944 = 2386^2 + 5788^2 .

It is a junction number, because it is equal to n+sod(n) for n = 39193894 and 39193903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39193949) 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 3 ways as a sum of consecutive naturals, for example, 979829 + ... + 979868.

It is an arithmetic number, because the mean of its divisors is an integer number (6858943).

Almost surely, 2^39193940 is an apocalyptic number.

It is an amenable number.

39193940 is an abundant number, since it is smaller than the sum of its proper divisors (43113376).

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

39193940 is a wasteful number, since it uses less digits than its factorization.

39193940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1959706 (or 1959704 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 38.

The square root of 39193940 is about 6260.5063692963. The cubic root of 39193940 is about 339.6823446050.

The spelling of 39193940 in words is "thirty-nine million, one hundred ninety-three thousand, nine hundred forty".