381347388 has 18 divisors (see below), whose sum is σ = 963961544. Its totient is φ = 127115784.

The previous prime is 381347377. The next prime is 381347431. The reversal of 381347388 is 883743183.

381347388 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (18).

381347388 is strictly pandigital in base 9.

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 5 ways as a sum of consecutive naturals, for example, 5296456 + ... + 5296527.

Almost surely, 2^381347388 is an apocalyptic number.

It is an amenable number.

381347388 is an abundant number, since it is smaller than the sum of its proper divisors (582614156).

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

381347388 is a wasteful number, since it uses less digits than its factorization.

381347388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10592993 (or 10592988 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 381347388 is about 19528.1178816598. The cubic root of 381347388 is about 725.1707171501.

The spelling of 381347388 in words is "three hundred eighty-one million, three hundred forty-seven thousand, three hundred eighty-eight".