381351768 has 64 divisors (see below), whose sum is σ = 1092000000. Its totient is φ = 108715392.

The previous prime is 381351767. The next prime is 381351779. The reversal of 381351768 is 867153183.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381351767) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81558 + ... + 86106.

It is an arithmetic number, because the mean of its divisors is an integer number (17062500).

Almost surely, 2^381351768 is an apocalyptic number.

It is an amenable number.

381351768 is an abundant number, since it is smaller than the sum of its proper divisors (710648232).

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

381351768 is a wasteful number, since it uses less digits than its factorization.

381351768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5064 (or 5060 counting only the distinct ones).

The product of its digits is 120960, while the sum is 42.

The square root of 381351768 is about 19528.2300273220. The cubic root of 381351768 is about 725.1734934775.

It can be divided in two parts, 38135 and 1768, that added together give a triangular number (39903 = T₂₈₂).

The spelling of 381351768 in words is "three hundred eighty-one million, three hundred fifty-one thousand, seven hundred sixty-eight".