39479897984 has 16 divisors (see below), whose sum is σ = 78651359520. Its totient is φ = 19739948928.

The previous prime is 39479897917. The next prime is 39479897987. The reversal of 39479897984 is 48979897493.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39479897987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 154218224 + ... + 154218479.

It is an arithmetic number, because the mean of its divisors is an integer number (4915709970).

Almost surely, 2^39479897984 is an apocalyptic number.

It is an amenable number.

39479897984 is a deficient number, since it is larger than the sum of its proper divisors (39171461536).

39479897984 is an equidigital number, since it uses as much as digits as its factorization.

39479897984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308436717 (or 308436705 counting only the distinct ones).

The product of its digits is 987614208, while the sum is 77.

The spelling of 39479897984 in words is "thirty-nine billion, four hundred seventy-nine million, eight hundred ninety-seven thousand, nine hundred eighty-four".