39538978 has 16 divisors (see below), whose sum is σ = 62815680. Its totient is φ = 18626256.

The previous prime is 39538963. The next prime is 39538979. The reversal of 39538978 is 87983593.

It is not an unprimeable number, because it can be changed into a prime (39538979) 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 7 ways as a sum of consecutive naturals, for example, 3333 + ... + 9496.

It is an arithmetic number, because the mean of its divisors is an integer number (3925980).

Almost surely, 2^39538978 is an apocalyptic number.

39538978 is a deficient number, since it is larger than the sum of its proper divisors (23276702).

39538978 is a wasteful number, since it uses less digits than its factorization.

39538978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12921.

The product of its digits is 1632960, while the sum is 52.

The square root of 39538978 is about 6288.0027035618. The cubic root of 39538978 is about 340.6762147608.

The spelling of 39538978 in words is "thirty-nine million, five hundred thirty-eight thousand, nine hundred seventy-eight".