39984147 has 36 divisors (see below), whose sum is σ = 68183856. Its totient is φ = 22508640.

The previous prime is 39984137. The next prime is 39984149. The reversal of 39984147 is 74148993.

It is not a de Polignac number, because 39984147 - 2⁷ = 39984019 is a prime.

It is a super-2 number, since 2×39984147² = 3197464022635218, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (39984149) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 30673 + ... + 31949.

It is an arithmetic number, because the mean of its divisors is an integer number (1893996).

Almost surely, 2^39984147 is an apocalyptic number.

39984147 is a deficient number, since it is larger than the sum of its proper divisors (28199709).

39984147 is a wasteful number, since it uses less digits than its factorization.

39984147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1368 (or 1358 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 39984147 is about 6323.3019064410. The cubic root of 39984147 is about 341.9500029508.

The spelling of 39984147 in words is "thirty-nine million, nine hundred eighty-four thousand, one hundred forty-seven".