384721764 has 48 divisors (see below), whose sum is σ = 1086277248. Its totient is φ = 103454208.

The previous prime is 384721751. The next prime is 384721769. The reversal of 384721764 is 467127483.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (384721769) 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, 133279 + ... + 136134.

It is an arithmetic number, because the mean of its divisors is an integer number (22630776).

Almost surely, 2^384721764 is an apocalyptic number.

384721764 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

384721764 is an abundant number, since it is smaller than the sum of its proper divisors (701555484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

384721764 is a wasteful number, since it uses less digits than its factorization.

384721764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269444 (or 269442 counting only the distinct ones).

The product of its digits is 225792, while the sum is 42.

The square root of 384721764 is about 19614.3254790982. The cubic root of 384721764 is about 727.3033452470.

The spelling of 384721764 in words is "three hundred eighty-four million, seven hundred twenty-one thousand, seven hundred sixty-four".