384538664 has 8 divisors (see below), whose sum is σ = 721010010. Its totient is φ = 192269328.

The previous prime is 384538639. The next prime is 384538697. The reversal of 384538664 is 466835483.

It can be written as a sum of positive squares in only one way, i.e., 280294564 + 104244100 = 16742^2 + 10210^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×384538664² = 295739968221809792, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24033659 + ... + 24033674.

Almost surely, 2^384538664 is an apocalyptic number.

It is an amenable number.

384538664 is a deficient number, since it is larger than the sum of its proper divisors (336471346).

384538664 is a wasteful number, since it uses less digits than its factorization.

384538664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48067339 (or 48067335 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 47.

The square root of 384538664 is about 19609.6574166914. The cubic root of 384538664 is about 727.1879455071.

The spelling of 384538664 in words is "three hundred eighty-four million, five hundred thirty-eight thousand, six hundred sixty-four".