1105801900 has 288 divisors, whose sum is σ = 3099801600. Its totient is φ = 333849600.

The previous prime is 1105801897. The next prime is 1105801909. The reversal of 1105801900 is 91085011.

It is a super-2 number, since 2×1105801900² = 2445595684087220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (1105801909) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 18127870 + ... + 18127930.

It is an arithmetic number, because the mean of its divisors is an integer number (10763200).

Almost surely, 2^1105801900 is an apocalyptic number.

1105801900 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 1105801900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1549900800).

1105801900 is an abundant number, since it is smaller than the sum of its proper divisors (1993999700).

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

1105801900 is a wasteful number, since it uses less digits than its factorization.

1105801900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177 (or 170 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 25.

The square root of 1105801900 is about 33253.5998051339. The cubic root of 1105801900 is about 1034.0918387450.

Adding to 1105801900 its reverse (91085011), we get a palindrome (1196886911).

The spelling of 1105801900 in words is "one billion, one hundred five million, eight hundred one thousand, nine hundred".