988822891 has 24 divisors (see below), whose sum is σ = 1184802000. Its totient is φ = 822249792.

The previous prime is 988822873. The next prime is 988822921. The reversal of 988822891 is 198228889.

It is not a de Polignac number, because 988822891 - 2⁵ = 988822859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (988822091) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 904141 + ... + 905233.

It is an arithmetic number, because the mean of its divisors is an integer number (49366750).

Almost surely, 2^988822891 is an apocalyptic number.

988822891 is a deficient number, since it is larger than the sum of its proper divisors (195979109).

988822891 is a wasteful number, since it uses less digits than its factorization.

988822891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1643 (or 1636 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 55.

The square root of 988822891 is about 31445.5543916783. The cubic root of 988822891 is about 996.2603292963.

The spelling of 988822891 in words is "nine hundred eighty-eight million, eight hundred twenty-two thousand, eight hundred ninety-one".