881664028 has 24 divisors (see below), whose sum is σ = 1764557312. Its totient is φ = 377592624.

The previous prime is 881664019. The next prime is 881664031. The reversal of 881664028 is 820466188.

It is a congruent number.

It is an unprimeable 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 7 ways as a sum of consecutive naturals, for example, 33001 + ... + 53407.

Almost surely, 2^881664028 is an apocalyptic number.

It is an amenable number.

881664028 is an abundant number, since it is smaller than the sum of its proper divisors (882893284).

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

881664028 is a wasteful number, since it uses less digits than its factorization.

881664028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21961 (or 21959 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 43.

The square root of 881664028 is about 29692.8278882292. The cubic root of 881664028 is about 958.8876105450.

The spelling of 881664028 in words is "eight hundred eighty-one million, six hundred sixty-four thousand, twenty-eight".