381777168 has 20 divisors (see below), whose sum is σ = 986257808. Its totient is φ = 127259040.

The previous prime is 381777163. The next prime is 381777181. The reversal of 381777168 is 861777183.

It is a super-2 number, since 2×381777168² = 291507612012200448, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 7953691 = 381777168 / (3 + 8 + 1 + 7 + 7 + 7 + 1 + 6 + 8).

It is not an unprimeable number, because it can be changed into a prime (381777163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3976798 + ... + 3976893.

Almost surely, 2^381777168 is an apocalyptic number.

It is an amenable number.

381777168 is an abundant number, since it is smaller than the sum of its proper divisors (604480640).

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

381777168 is a wasteful number, since it uses less digits than its factorization.

381777168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7953702 (or 7953696 counting only the distinct ones).

The product of its digits is 395136, while the sum is 48.

The square root of 381777168 is about 19539.1189156523. The cubic root of 381777168 is about 725.4430382863.

The spelling of 381777168 in words is "three hundred eighty-one million, seven hundred seventy-seven thousand, one hundred sixty-eight".