381428032 has 14 divisors (see below), whose sum is σ = 756896378. Its totient is φ = 190713984.

The previous prime is 381428029. The next prime is 381428041. The reversal of 381428032 is 230824183.

It can be written as a sum of positive squares in only one way, i.e., 207821056 + 173606976 = 14416^2 + 13176^2 .

It is a junction number, because it is equal to n+sod(n) for n = 381427985 and 381428003.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2979843 + ... + 2979970.

It is an arithmetic number, because the mean of its divisors is an integer number (54064027).

Almost surely, 2^381428032 is an apocalyptic number.

381428032 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

381428032 is a deficient number, since it is larger than the sum of its proper divisors (375468346).

381428032 is an equidigital number, since it uses as much as digits as its factorization.

381428032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5959825 (or 5959815 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 381428032 is about 19530.1825900323. The cubic root of 381428032 is about 725.2218311276.

The spelling of 381428032 in words is "three hundred eighty-one million, four hundred twenty-eight thousand, thirty-two".