881121520 has 40 divisors (see below), whose sum is σ = 2052301680. Its totient is φ = 351813120.

The previous prime is 881121511. The next prime is 881121533. The reversal of 881121520 is 25121188.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×881121520² = 1552750266014220800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36036 + ... + 55324.

It is an arithmetic number, because the mean of its divisors is an integer number (51307542).

Almost surely, 2^881121520 is an apocalyptic number.

881121520 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

881121520 is an abundant number, since it is smaller than the sum of its proper divisors (1171180160).

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

881121520 is a wasteful number, since it uses less digits than its factorization.

881121520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19873 (or 19867 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 28.

The square root of 881121520 is about 29683.6911451389. The cubic root of 881121520 is about 958.6908950473.

The spelling of 881121520 in words is "eight hundred eighty-one million, one hundred twenty-one thousand, five hundred twenty".