1080199820 has 24 divisors (see below), whose sum is σ = 2592479904. Its totient is φ = 370354176.

The previous prime is 1080199811. The next prime is 1080199829. The reversal of 1080199820 is 289910801.

It is an interprime number because it is at equal distance from previous prime (1080199811) and next prime (1080199829).

It is a super-2 number, since 2×1080199820² = 2333663302256064800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1080199829) 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, 3857717 + ... + 3857996.

It is an arithmetic number, because the mean of its divisors is an integer number (108019996).

Almost surely, 2^1080199820 is an apocalyptic number.

1080199820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1080199820 is an abundant number, since it is smaller than the sum of its proper divisors (1512280084).

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

1080199820 is a wasteful number, since it uses less digits than its factorization.

1080199820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7715729 (or 7715727 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 38.

The square root of 1080199820 is about 32866.3934741858. The cubic root of 1080199820 is about 1026.0488395473.

The spelling of 1080199820 in words is "one billion, eighty million, one hundred ninety-nine thousand, eight hundred twenty".