39078940 has 24 divisors (see below), whose sum is σ = 82293120. Its totient is φ = 15588288.

The previous prime is 39078911. The next prime is 39078947. The reversal of 39078940 is 4987093.

It is a junction number, because it is equal to n+sod(n) for n = 39078893 and 39078902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39078947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5269 + ... + 10291.

It is an arithmetic number, because the mean of its divisors is an integer number (3428880).

Almost surely, 2^39078940 is an apocalyptic number.

It is an amenable number.

39078940 is an abundant number, since it is smaller than the sum of its proper divisors (43214180).

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

39078940 is a wasteful number, since it uses less digits than its factorization.

39078940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5421 (or 5419 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 39078940 is about 6251.3150616490. The cubic root of 39078940 is about 339.3497954255.

The spelling of 39078940 in words is "thirty-nine million, seventy-eight thousand, nine hundred forty".