1158409512 has 160 divisors (see below), whose sum is σ = 3700204200. Its totient is φ = 335425536.

The previous prime is 1158409507. The next prime is 1158409523. The reversal of 1158409512 is 2159048511.

It can be written as a sum of positive squares in 4 ways, for example, as 587868516 + 570540996 = 24246^2 + 23886^2 .

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 39 ways as a sum of consecutive naturals, for example, 139164 + ... + 147252.

Almost surely, 2^1158409512 is an apocalyptic number.

1158409512 is a gapful number since it is divisible by the number (12) 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 1158409512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1850102100).

1158409512 is an abundant number, since it is smaller than the sum of its proper divisors (2541794688).

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

1158409512 is a wasteful number, since it uses less digits than its factorization.

1158409512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8137 (or 8124 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 36.

The square root of 1158409512 is about 34035.4155549774. The cubic root of 1158409512 is about 1050.2371382760.

The spelling of 1158409512 in words is "one billion, one hundred fifty-eight million, four hundred nine thousand, five hundred twelve".