381427911 has 12 divisors (see below), whose sum is σ = 557590488. Its totient is φ = 251221104.

The previous prime is 381427867. The next prime is 381427919. The reversal of 381427911 is 119724183.

It is a happy number.

381427911 is a `hidden beast` number, since 381 + 4 + 279 + 1 + 1 = 666.

It is not a de Polignac number, because 381427911 - 2¹⁰ = 381426887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381427919) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 254560 + ... + 256053.

It is an arithmetic number, because the mean of its divisors is an integer number (46465874).

Almost surely, 2^381427911 is an apocalyptic number.

381427911 is a deficient number, since it is larger than the sum of its proper divisors (176162577).

381427911 is a wasteful number, since it uses less digits than its factorization.

381427911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510702 (or 510699 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 381427911 is about 19530.1794922627. The cubic root of 381427911 is about 725.2217544405.

The spelling of 381427911 in words is "three hundred eighty-one million, four hundred twenty-seven thousand, nine hundred eleven".