881399808 has 72 divisors (see below), whose sum is σ = 2545697700. Its totient is φ = 293793792.

The previous prime is 881399801. The next prime is 881399819. The reversal of 881399808 is 808993188.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (881399801) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5478 + ... + 42341.

Almost surely, 2^881399808 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 881399808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1272848850).

881399808 is an abundant number, since it is smaller than the sum of its proper divisors (1664297892).

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

881399808 is a wasteful number, since it uses less digits than its factorization.

881399808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47847 (or 47824 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 54.

The square root of 881399808 is about 29688.3783322700. The cubic root of 881399808 is about 958.7918134350.

It can be divided in two parts, 881 and 399808, that added together give a square (400689 = 633²).

The spelling of 881399808 in words is "eight hundred eighty-one million, three hundred ninety-nine thousand, eight hundred eight".