384630987 has 30 divisors (see below), whose sum is σ = 563992548. Its totient is φ = 233163216.

The previous prime is 384630979. The next prime is 384630991. The reversal of 384630987 is 789036483.

It is not a de Polignac number, because 384630987 - 2³ = 384630979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (384630997) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 5740728 + ... + 5740794.

Almost surely, 2^384630987 is an apocalyptic number.

384630987 is a deficient number, since it is larger than the sum of its proper divisors (179361561).

384630987 is an frugal number, since it uses more digits than its factorization.

384630987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189 (or 83 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 48.

The square root of 384630987 is about 19612.0112941024. The cubic root of 384630987 is about 727.2461371419.

Multiplying 384630987 by its sum of digits (48), we get a square (18462287376 = 135876²).

The spelling of 384630987 in words is "three hundred eighty-four million, six hundred thirty thousand, nine hundred eighty-seven".