384694978 has 4 divisors (see below), whose sum is σ = 577042470. Its totient is φ = 192347488.

The previous prime is 384694951. The next prime is 384694997. The reversal of 384694978 is 879496483.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 879496483 = 241 ⋅3649363.

It can be written as a sum of positive squares in only one way, i.e., 268206129 + 116488849 = 16377^2 + 10793^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96173743 + ... + 96173746.

Almost surely, 2^384694978 is an apocalyptic number.

384694978 is a deficient number, since it is larger than the sum of its proper divisors (192347492).

384694978 is a wasteful number, since it uses less digits than its factorization.

384694978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192347491.

The product of its digits is 10450944, while the sum is 58.

The square root of 384694978 is about 19613.6426499516. The cubic root of 384694978 is about 727.2864655160.

The spelling of 384694978 in words is "three hundred eighty-four million, six hundred ninety-four thousand, nine hundred seventy-eight".