384281780 has 24 divisors (see below), whose sum is σ = 807421608. Its totient is φ = 153630848.

The previous prime is 384281759. The next prime is 384281867. The reversal of 384281780 is 87182483.

It can be written as a sum of positive squares in 4 ways, for example, as 87684496 + 296597284 = 9364^2 + 17222^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45662 + ... + 53418.

It is an arithmetic number, because the mean of its divisors is an integer number (33642567).

Almost surely, 2^384281780 is an apocalyptic number.

It is an amenable number.

384281780 is an abundant number, since it is smaller than the sum of its proper divisors (423139828).

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

384281780 is a wasteful number, since it uses less digits than its factorization.

384281780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10243 (or 10241 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 41.

The square root of 384281780 is about 19603.1063864889. The cubic root of 384281780 is about 727.0259812472.

The spelling of 384281780 in words is "three hundred eighty-four million, two hundred eighty-one thousand, seven hundred eighty".