988833891 has 32 divisors (see below), whose sum is σ = 1424896000. Its totient is φ = 607951008.

The previous prime is 988833889. The next prime is 988833899. The reversal of 988833891 is 198338889.

988833891 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 988833891 - 2¹ = 988833889 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (988833899) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1075530 + ... + 1076448.

It is an arithmetic number, because the mean of its divisors is an integer number (44528000).

Almost surely, 2^988833891 is an apocalyptic number.

988833891 is a deficient number, since it is larger than the sum of its proper divisors (436062109).

988833891 is a wasteful number, since it uses less digits than its factorization.

988833891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1423.

The product of its digits is 2985984, while the sum is 57.

The square root of 988833891 is about 31445.7292966787. The cubic root of 988833891 is about 996.2640235281.

The spelling of 988833891 in words is "nine hundred eighty-eight million, eight hundred thirty-three thousand, eight hundred ninety-one".