39678140 has 24 divisors (see below), whose sum is σ = 86013312. Its totient is φ = 15359040.

The previous prime is 39678131. The next prime is 39678161. The reversal of 39678140 is 4187693.

It is a junction number, because it is equal to n+sod(n) for n = 39678094 and 39678103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31379 + ... + 32618.

It is an arithmetic number, because the mean of its divisors is an integer number (3583888).

Almost surely, 2^39678140 is an apocalyptic number.

It is an amenable number.

39678140 is an abundant number, since it is smaller than the sum of its proper divisors (46335172).

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

39678140 is a wasteful number, since it uses less digits than its factorization.

39678140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64037 (or 64035 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 39678140 is about 6299.0586598316. The cubic root of 39678140 is about 341.0754298611.

The spelling of 39678140 in words is "thirty-nine million, six hundred seventy-eight thousand, one hundred forty".