1101163920 has 80 divisors (see below), whose sum is σ = 3424816512. Its totient is φ = 292679680.

The previous prime is 1101163897. The next prime is 1101163949. The reversal of 1101163920 is 293611011.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67264 + ... + 82016.

Almost surely, 2^1101163920 is an apocalyptic number.

1101163920 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 1101163920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1712408256).

1101163920 is an abundant number, since it is smaller than the sum of its proper divisors (2323652592).

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

1101163920 is a wasteful number, since it uses less digits than its factorization.

1101163920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15080 (or 15074 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 1101163920 is about 33183.7900186220. The cubic root of 1101163920 is about 1032.6440754416.

Adding to 1101163920 its reverse (293611011), we get a palindrome (1394774931).

The spelling of 1101163920 in words is "one billion, one hundred one million, one hundred sixty-three thousand, nine hundred twenty".