382689891 has 12 divisors (see below), whose sum is σ = 554832720. Its totient is φ = 254176560.

The previous prime is 382689889. The next prime is 382689899. The reversal of 382689891 is 198986283.

It is a happy number.

It is not a de Polignac number, because 382689891 - 2¹ = 382689889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (382689899) 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, 76615 + ... + 81456.

It is an arithmetic number, because the mean of its divisors is an integer number (46236060).

Almost surely, 2^382689891 is an apocalyptic number.

382689891 is a deficient number, since it is larger than the sum of its proper divisors (172142829).

382689891 is a wasteful number, since it uses less digits than its factorization.

382689891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158346 (or 158343 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 54.

The square root of 382689891 is about 19562.4612715272. The cubic root of 382689891 is about 726.0206890263.

Adding to 382689891 its sum of digits (54), we get a triangular number (382689945 = T₂₇₆₆₅).

The spelling of 382689891 in words is "three hundred eighty-two million, six hundred eighty-nine thousand, eight hundred ninety-one".