881618 has 4 divisors (see below), whose sum is σ = 1322430. Its totient is φ = 440808.

The previous prime is 881611. The next prime is 881641. The reversal of 881618 is 816188.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 597529 + 284089 = 773^2 + 533^2 .

It is not an unprimeable number, because it can be changed into a prime (881611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220403 + ... + 220406.

2⁸⁸¹⁶¹⁸ is an apocalyptic number.

881618 is a deficient number, since it is larger than the sum of its proper divisors (440812).

881618 is a wasteful number, since it uses less digits than its factorization.

881618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440811.

The product of its digits is 3072, while the sum is 32.

The square root of 881618 is about 938.9451528178. The cubic root of 881618 is about 95.8870923748.

The spelling of 881618 in words is "eight hundred eighty-one thousand, six hundred eighteen".