1158497280 has 264 divisors, whose sum is σ = 4148761344. Its totient is φ = 298598400.

The previous prime is 1158497243. The next prime is 1158497293. The reversal of 1158497280 is 827948511.

1158497280 is a `hidden beast` number, since 1 + 158 + 497 + 2 + 8 + 0 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1428075 + ... + 1428885.

Almost surely, 2^1158497280 is an apocalyptic number.

1158497280 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 1158497280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2074380672).

1158497280 is an abundant number, since it is smaller than the sum of its proper divisors (2990264064).

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

1158497280 is a wasteful number, since it uses less digits than its factorization.

1158497280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 873 (or 852 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The square root of 1158497280 is about 34036.7048933941. The cubic root of 1158497280 is about 1050.2636616785.

The spelling of 1158497280 in words is "one billion, one hundred fifty-eight million, four hundred ninety-seven thousand, two hundred eighty".