889640404928 has 56 divisors (see below), whose sum is σ = 1931325545520. Its totient is φ = 403236331520.

The previous prime is 889640404927. The next prime is 889640404943. The reversal of 889640404928 is 829404046988.

It is a hoax number, since the sum of its digits (62) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (889640404921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1541423 + ... + 2038446.

It is an arithmetic number, because the mean of its divisors is an integer number (34487956170).

Almost surely, 2^889640404928 is an apocalyptic number.

889640404928 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

889640404928 is an abundant number, since it is smaller than the sum of its proper divisors (1041685140592).

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

889640404928 is a wasteful number, since it uses less digits than its factorization.

889640404928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3580245 (or 3580235 counting only the distinct ones).

The product of its (nonzero) digits is 31850496, while the sum is 62.

The spelling of 889640404928 in words is "eight hundred eighty-nine billion, six hundred forty million, four hundred four thousand, nine hundred twenty-eight".