1098561800 has 48 divisors (see below), whose sum is σ = 2919039360. Its totient is φ = 376649280.

The previous prime is 1098561797. The next prime is 1098561803. The reversal of 1098561800 is 81658901.

It is an interprime number because it is at equal distance from previous prime (1098561797) and next prime (1098561803).

It is not an unprimeable number, because it can be changed into a prime (1098561803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 390944 + ... + 393743.

It is an arithmetic number, because the mean of its divisors is an integer number (60813320).

Almost surely, 2^1098561800 is an apocalyptic number.

1098561800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1098561800 is an abundant number, since it is smaller than the sum of its proper divisors (1820477560).

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

1098561800 is a wasteful number, since it uses less digits than its factorization.

1098561800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784710 (or 784701 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 38.

The square root of 1098561800 is about 33144.5591311757. The cubic root of 1098561800 is about 1031.8300328021.

The spelling of 1098561800 in words is "one billion, ninety-eight million, five hundred sixty-one thousand, eight hundred".