384638979 has 16 divisors (see below), whose sum is σ = 530216960. Its totient is φ = 247769280.

The previous prime is 384638953. The next prime is 384638981. The reversal of 384638979 is 979836483.

It is a happy number.

It is not a de Polignac number, because 384638979 - 2⁷ = 384638851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (384630979) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64767 + ... + 70455.

It is an arithmetic number, because the mean of its divisors is an integer number (33138560).

Almost surely, 2^384638979 is an apocalyptic number.

384638979 is a deficient number, since it is larger than the sum of its proper divisors (145577981).

384638979 is a wasteful number, since it uses less digits than its factorization.

384638979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6450.

The product of its digits is 7838208, while the sum is 57.

The square root of 384638979 is about 19612.2150457311. The cubic root of 384638979 is about 727.2511741004.

The spelling of 384638979 in words is "three hundred eighty-four million, six hundred thirty-eight thousand, nine hundred seventy-nine".