381188869 has 8 divisors (see below), whose sum is σ = 386614080. Its totient is φ = 375789216.

The previous prime is 381188839. The next prime is 381188881. The reversal of 381188869 is 968881183.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 381188869 - 2¹³ = 381180677 is a prime.

It is a super-2 number, since 2×381188869² = 290609907698998322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381188809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24712 + ... + 37054.

It is an arithmetic number, because the mean of its divisors is an integer number (48326760).

Almost surely, 2^381188869 is an apocalyptic number.

It is an amenable number.

381188869 is a deficient number, since it is larger than the sum of its proper divisors (5425211).

381188869 is a wasteful number, since it uses less digits than its factorization.

381188869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12779.

The product of its digits is 663552, while the sum is 52.

The square root of 381188869 is about 19524.0587225095. The cubic root of 381188869 is about 725.0702232416.

The spelling of 381188869 in words is "three hundred eighty-one million, one hundred eighty-eight thousand, eight hundred sixty-nine".