1098209688 has 32 divisors (see below), whose sum is σ = 2748893760. Its totient is φ = 365620640.

The previous prime is 1098209687. The next prime is 1098209713. The reversal of 1098209688 is 8869028901.

It is a self number, because there is not a number n which added to its sum of digits gives 1098209688.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1098209687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7818 + ... + 47513.

It is an arithmetic number, because the mean of its divisors is an integer number (85902930).

Almost surely, 2^1098209688 is an apocalyptic number.

It is an amenable number.

1098209688 is an abundant number, since it is smaller than the sum of its proper divisors (1650684072).

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

1098209688 is a wasteful number, since it uses less digits than its factorization.

1098209688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56167 (or 56163 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 51.

The square root of 1098209688 is about 33139.2469437674. The cubic root of 1098209688 is about 1031.7197799968.

The spelling of 1098209688 in words is "one billion, ninety-eight million, two hundred nine thousand, six hundred eighty-eight".