381787371 has 24 divisors (see below), whose sum is σ = 657957840. Its totient is φ = 218163456.

The previous prime is 381787333. The next prime is 381787391. The reversal of 381787371 is 173787183.

It is not a de Polignac number, because 381787371 - 2⁷ = 381787243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (381787321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 142966 + ... + 145611.

It is an arithmetic number, because the mean of its divisors is an integer number (27414910).

Almost surely, 2^381787371 is an apocalyptic number.

381787371 is a deficient number, since it is larger than the sum of its proper divisors (276170469).

381787371 is a wasteful number, since it uses less digits than its factorization.

381787371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288600 (or 288587 counting only the distinct ones).

The product of its digits is 197568, while the sum is 45.

The square root of 381787371 is about 19539.3800055171. The cubic root of 381787371 is about 725.4495007204.

The spelling of 381787371 in words is "three hundred eighty-one million, seven hundred eighty-seven thousand, three hundred seventy-one".