1158939900 has 216 divisors, whose sum is σ = 3871991760. Its totient is φ = 300464640.

The previous prime is 1158939877. The next prime is 1158939973. The reversal of 1158939900 is 99398511.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 898456 + ... + 899744.

Almost surely, 2^1158939900 is an apocalyptic number.

1158939900 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 1158939900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1935995880).

1158939900 is an abundant number, since it is smaller than the sum of its proper divisors (2713051860).

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

1158939900 is a wasteful number, since it uses less digits than its factorization.

1158939900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1355 (or 1336 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 45.

The square root of 1158939900 is about 34043.2063707284. The cubic root of 1158939900 is about 1050.3974005945.

The spelling of 1158939900 in words is "one billion, one hundred fifty-eight million, nine hundred thirty-nine thousand, nine hundred".