39878620 has 12 divisors (see below), whose sum is σ = 83745144. Its totient is φ = 15951440.

The previous prime is 39878611. The next prime is 39878621. The reversal of 39878620 is 2687893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39878621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 996946 + ... + 996985.

It is an arithmetic number, because the mean of its divisors is an integer number (6978762).

Almost surely, 2^39878620 is an apocalyptic number.

It is an amenable number.

39878620 is an abundant number, since it is smaller than the sum of its proper divisors (43866524).

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

39878620 is a wasteful number, since it uses less digits than its factorization.

39878620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1993940 (or 1993938 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 39878620 is about 6314.9520979973. The cubic root of 39878620 is about 341.6489107039.

The spelling of 39878620 in words is "thirty-nine million, eight hundred seventy-eight thousand, six hundred twenty".