1098915688 has 64 divisors (see below), whose sum is σ = 2288280960. Its totient is φ = 491463936.

The previous prime is 1098915659. The next prime is 1098915731. The reversal of 1098915688 is 8865198901.

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 15 ways as a sum of consecutive naturals, for example, 1334845 + ... + 1335667.

It is an arithmetic number, because the mean of its divisors is an integer number (35754390).

Almost surely, 2^1098915688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1098915688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1144140480).

1098915688 is an abundant number, since it is smaller than the sum of its proper divisors (1189365272).

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

1098915688 is a wasteful number, since it uses less digits than its factorization.

1098915688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1226 (or 1222 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 55.

The square root of 1098915688 is about 33149.8972547427. The cubic root of 1098915688 is about 1031.9408179711.

The spelling of 1098915688 in words is "one billion, ninety-eight million, nine hundred fifteen thousand, six hundred eighty-eight".