1155194880 has 448 divisors, whose sum is σ = 4529571840. Its totient is φ = 245366784.

The previous prime is 1155194879. The next prime is 1155194891. The reversal of 1155194880 is 884915511.

It is a tau number, because it is divible by the number of its divisors (448).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14622681 + ... + 14622759.

Almost surely, 2^1155194880 is an apocalyptic number.

1155194880 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 1155194880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2264785920).

1155194880 is an abundant number, since it is smaller than the sum of its proper divisors (3374376960).

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

1155194880 is an equidigital number, since it uses as much as digits as its factorization.

1155194880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137 (or 113 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 42.

The square root of 1155194880 is about 33988.1579377288. The cubic root of 1155194880 is about 1049.2647551185.

The spelling of 1155194880 in words is "one billion, one hundred fifty-five million, one hundred ninety-four thousand, eight hundred eighty".