39984678 has 48 divisors (see below), whose sum is σ = 92972880. Its totient is φ = 12864096.

The previous prime is 39984677. The next prime is 39984689. The reversal of 39984678 is 87648993.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39984677) 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 23 ways as a sum of consecutive naturals, for example, 12676 + ... + 15512.

It is an arithmetic number, because the mean of its divisors is an integer number (1936935).

Almost surely, 2^39984678 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39984678, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46486440).

39984678 is an abundant number, since it is smaller than the sum of its proper divisors (52988202).

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

39984678 is a wasteful number, since it uses less digits than its factorization.

39984678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2883 (or 2871 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The square root of 39984678 is about 6323.3438938587. The cubic root of 39984678 is about 341.9515166728.

The spelling of 39984678 in words is "thirty-nine million, nine hundred eighty-four thousand, six hundred seventy-eight".