881604 has 36 divisors (see below), whose sum is σ = 2313584. Its totient is φ = 293544.

The previous prime is 881597. The next prime is 881611. The reversal of 881604 is 406188.

It is an interprime number because it is at equal distance from previous prime (881597) and next prime (881611).

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×881604² = 1554451225632, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

881604 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 11 ways as a sum of consecutive naturals, for example, 519 + ... + 1425.

2⁸⁸¹⁶⁰⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 881604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1156792).

881604 is an abundant number, since it is smaller than the sum of its proper divisors (1431980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

881604 is a wasteful number, since it uses less digits than its factorization.

881604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 926 (or 912 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 881604 is about 938.9376976136. The cubic root of 881604 is about 95.8865848131.

It can be divided in two parts, 881 and 604, that added together give a triangular number (1485 = T₅₄).

The spelling of 881604 in words is "eight hundred eighty-one thousand, six hundred four".