881391 has 24 divisors (see below), whose sum is σ = 1444480. Its totient is φ = 466992.

The previous prime is 881369. The next prime is 881393. The reversal of 881391 is 193188.

It is not a de Polignac number, because 881391 - 2⁶ = 881327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (881393) 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, 18730 + ... + 18776.

2⁸⁸¹³⁹¹ is an apocalyptic number.

881391 is a deficient number, since it is larger than the sum of its proper divisors (563089).

881391 is a wasteful number, since it uses less digits than its factorization.

881391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123 (or 76 counting only the distinct ones).

The product of its digits is 1728, while the sum is 30.

The square root of 881391 is about 938.8242647056. The cubic root of 881391 is about 95.8788619627.

The spelling of 881391 in words is "eight hundred eighty-one thousand, three hundred ninety-one".