881138840 has 32 divisors (see below), whose sum is σ = 1986677280. Its totient is φ = 351724032.

The previous prime is 881138837. The next prime is 881138879. The reversal of 881138840 is 48831188.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3137 + ... + 42096.

It is an arithmetic number, because the mean of its divisors is an integer number (62083665).

Almost surely, 2^881138840 is an apocalyptic number.

It is an amenable number.

881138840 is an abundant number, since it is smaller than the sum of its proper divisors (1105538440).

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

881138840 is a wasteful number, since it uses less digits than its factorization.

881138840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45731 (or 45727 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 41.

The square root of 881138840 is about 29683.9828863985. The cubic root of 881138840 is about 958.6971765939.

The spelling of 881138840 in words is "eight hundred eighty-one million, one hundred thirty-eight thousand, eight hundred forty".