1889381 has 16 divisors (see below), whose sum is σ = 2177280. Its totient is φ = 1626240.

The previous prime is 1889369. The next prime is 1889383. The reversal of 1889381 is 1839881.

It is a cyclic number.

It is not a de Polignac number, because 1889381 - 2⁶ = 1889317 is a prime.

It is a super-2 number, since 2×1889381² = 7139521126322, 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 (1889383) 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 15 ways as a sum of consecutive naturals, for example, 21185 + ... + 21273.

It is an arithmetic number, because the mean of its divisors is an integer number (136080).

2^1889381 is an apocalyptic number.

It is an amenable number.

1889381 is a deficient number, since it is larger than the sum of its proper divisors (287899).

1889381 is a wasteful number, since it uses less digits than its factorization.

1889381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196.

The product of its digits is 13824, while the sum is 38.

The square root of 1889381 is about 1374.5475619272. The cubic root of 1889381 is about 123.6250597659.

The spelling of 1889381 in words is "one million, eight hundred eighty-nine thousand, three hundred eighty-one".