39838540 has 24 divisors (see below), whose sum is σ = 95612832. Its totient is φ = 13658880.

The previous prime is 39838517. The next prime is 39838543. The reversal of 39838540 is 4583893.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 39838493 and 39838502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39838543) 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, 142141 + ... + 142420.

It is an arithmetic number, because the mean of its divisors is an integer number (3983868).

Almost surely, 2^39838540 is an apocalyptic number.

It is an amenable number.

39838540 is an abundant number, since it is smaller than the sum of its proper divisors (55774292).

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

39838540 is a wasteful number, since it uses less digits than its factorization.

39838540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284577 (or 284575 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 39838540 is about 6311.7778794885. Note that the first 3 decimals coincide. The cubic root of 39838540 is about 341.5344142780.

The spelling of 39838540 in words is "thirty-nine million, eight hundred thirty-eight thousand, five hundred forty".