881621445 has 16 divisors (see below), whose sum is σ = 1493570880. Its totient is φ = 442539264.

The previous prime is 881621437. The next prime is 881621449. The reversal of 881621445 is 544126188.

881621445 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 881621445 - 2³ = 881621437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (881621449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1728415 + ... + 1728924.

It is an arithmetic number, because the mean of its divisors is an integer number (93348180).

Almost surely, 2^881621445 is an apocalyptic number.

881621445 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

881621445 is a deficient number, since it is larger than the sum of its proper divisors (611949435).

881621445 is a wasteful number, since it uses less digits than its factorization.

881621445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3457364.

The product of its digits is 61440, while the sum is 39.

The square root of 881621445 is about 29692.1108208898. The cubic root of 881621445 is about 958.8721727035.

The spelling of 881621445 in words is "eight hundred eighty-one million, six hundred twenty-one thousand, four hundred forty-five".