1098986240 has 144 divisors (see below), whose sum is σ = 2907303840. Its totient is φ = 394690560.

The previous prime is 1098986219. The next prime is 1098986243. The reversal of 1098986240 is 426898901.

It is not an unprimeable number, because it can be changed into a prime (1098986243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1252682 + ... + 1253558.

It is an arithmetic number, because the mean of its divisors is an integer number (20189610).

Almost surely, 2^1098986240 is an apocalyptic number.

1098986240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1098986240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1453651920).

1098986240 is an abundant number, since it is smaller than the sum of its proper divisors (1808317600).

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

1098986240 is an equidigital number, since it uses as much as digits as its factorization.

1098986240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 998 (or 984 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 47.

The square root of 1098986240 is about 33150.9613736917. The cubic root of 1098986240 is about 1031.9629015368.

The spelling of 1098986240 in words is "one billion, ninety-eight million, nine hundred eighty-six thousand, two hundred forty".