381879489 has 8 divisors (see below), whose sum is σ = 509710752. Its totient is φ = 254317280.

The previous prime is 381879481. The next prime is 381879493. The reversal of 381879489 is 984978183.

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 381879489 - 2³ = 381879481 is a prime.

It is a super-2 number, since 2×381879489² = 291663888237802242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (381879481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63927 + ... + 69644.

It is an arithmetic number, because the mean of its divisors is an integer number (63713844).

Almost surely, 2^381879489 is an apocalyptic number.

It is an amenable number.

381879489 is a deficient number, since it is larger than the sum of its proper divisors (127831263).

381879489 is a wasteful number, since it uses less digits than its factorization.

381879489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134527.

The product of its digits is 3483648, while the sum is 57.

The square root of 381879489 is about 19541.7371029292. The cubic root of 381879489 is about 725.5078417310.

The spelling of 381879489 in words is "three hundred eighty-one million, eight hundred seventy-nine thousand, four hundred eighty-nine".