384569856 has 240 divisors, whose sum is σ = 1260106848. Its totient is φ = 116121600.

The previous prime is 384569851. The next prime is 384569879. The reversal of 384569856 is 658965483.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (384569851) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1368436 + ... + 1368716.

Almost surely, 2^384569856 is an apocalyptic number.

384569856 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 384569856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (630053424).

384569856 is an abundant number, since it is smaller than the sum of its proper divisors (875536992).

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

384569856 is an equidigital number, since it uses as much as digits as its factorization.

384569856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325 (or 297 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 54.

The square root of 384569856 is about 19610.4527229740. The cubic root of 384569856 is about 727.2076070178.

The spelling of 384569856 in words is "three hundred eighty-four million, five hundred sixty-nine thousand, eight hundred fifty-six".