384643780 has 24 divisors (see below), whose sum is σ = 811383552. Its totient is φ = 153165792.

The previous prime is 384643769. The next prime is 384643781. The reversal of 384643780 is 87346483.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (384643781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38662 + ... + 47581.

It is an arithmetic number, because the mean of its divisors is an integer number (33807648).

Almost surely, 2^384643780 is an apocalyptic number.

It is an amenable number.

384643780 is an abundant number, since it is smaller than the sum of its proper divisors (426739772).

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

384643780 is a wasteful number, since it uses less digits than its factorization.

384643780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86475 (or 86473 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 43.

The square root of 384643780 is about 19612.3374435583. The cubic root of 384643780 is about 727.2541998973.

The spelling of 384643780 in words is "three hundred eighty-four million, six hundred forty-three thousand, seven hundred eighty".