1098823812 has 24 divisors (see below), whose sum is σ = 2584114176. Its totient is φ = 363390048.

The previous prime is 1098823811. The next prime is 1098823823. The reversal of 1098823812 is 2183288901.

It is a super-2 number, since 2×1098823812² = 2414827539636422688, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1098823811) 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, 358983 + ... + 362030.

It is an arithmetic number, because the mean of its divisors is an integer number (107671424).

Almost surely, 2^1098823812 is an apocalyptic number.

1098823812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1098823812 is an abundant number, since it is smaller than the sum of its proper divisors (1485290364).

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

1098823812 is a wasteful number, since it uses less digits than its factorization.

1098823812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721147 (or 721145 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 42.

The square root of 1098823812 is about 33148.5114597926. The cubic root of 1098823812 is about 1031.9120583377.

The spelling of 1098823812 in words is "one billion, ninety-eight million, eight hundred twenty-three thousand, eight hundred twelve".