881690 has 8 divisors (see below), whose sum is σ = 1587060. Its totient is φ = 352672.

The previous prime is 881681. The next prime is 881707. The reversal of 881690 is 96188.

881690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 877969 + 3721 = 937^2 + 61^2 .

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

It is a super-2 number, since 2×881690² = 1554754512200, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44075 + ... + 44094.

2⁸⁸¹⁶⁹⁰ is an apocalyptic number.

881690 is a deficient number, since it is larger than the sum of its proper divisors (705370).

881690 is a wasteful number, since it uses less digits than its factorization.

881690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88176.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 881690 is about 938.9834929327. The cubic root of 881690 is about 95.8897026068.

The spelling of 881690 in words is "eight hundred eighty-one thousand, six hundred ninety".