1098299820 has 24 divisors (see below), whose sum is σ = 3075239664. Its totient is φ = 292879936.

The previous prime is 1098299779. The next prime is 1098299827. The reversal of 1098299820 is 289928901.

It is a super-2 number, since 2×1098299820² = 2412524989224064800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1098299820.

It is not an unprimeable number, because it can be changed into a prime (1098299827) 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, 9152439 + ... + 9152558.

It is an arithmetic number, because the mean of its divisors is an integer number (128134986).

Almost surely, 2^1098299820 is an apocalyptic number.

1098299820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1098299820 is an abundant number, since it is smaller than the sum of its proper divisors (1976939844).

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

1098299820 is a wasteful number, since it uses less digits than its factorization.

1098299820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18305009 (or 18305007 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 48.

The square root of 1098299820 is about 33140.6068139978. The cubic root of 1098299820 is about 1031.7480042435.

The spelling of 1098299820 in words is "one billion, ninety-eight million, two hundred ninety-nine thousand, eight hundred twenty".