1158203880 has 256 divisors, whose sum is σ = 4121280000. Its totient is φ = 288313344.

The previous prime is 1158203869. The next prime is 1158203899. The reversal of 1158203880 is 883028511.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3653482 + ... + 3653798.

It is an arithmetic number, because the mean of its divisors is an integer number (16098750).

Almost surely, 2^1158203880 is an apocalyptic number.

1158203880 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 1158203880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2060640000).

1158203880 is an abundant number, since it is smaller than the sum of its proper divisors (2963076120).

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

1158203880 is a wasteful number, since it uses less digits than its factorization.

1158203880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553 (or 543 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 36.

The square root of 1158203880 is about 34032.3945675293. The cubic root of 1158203880 is about 1050.1749912428.

The spelling of 1158203880 in words is "one billion, one hundred fifty-eight million, two hundred three thousand, eight hundred eighty".