1158566640 has 320 divisors, whose sum is σ = 4545994752. Its totient is φ = 237081600.

The previous prime is 1158566639. The next prime is 1158566659. The reversal of 1158566640 is 466658511.

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

It is a junction number, because it is equal to n+sod(n) for n = 1158566592 and 1158566601.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1311639 + ... + 1312521.

Almost surely, 2^1158566640 is an apocalyptic number.

1158566640 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 1158566640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2272997376).

1158566640 is an abundant number, since it is smaller than the sum of its proper divisors (3387428112).

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

1158566640 is a wasteful number, since it uses less digits than its factorization.

1158566640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 988 (or 982 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 42.

The square root of 1158566640 is about 34037.7237781847. The cubic root of 1158566640 is about 1050.2846212541.

The spelling of 1158566640 in words is "one billion, one hundred fifty-eight million, five hundred sixty-six thousand, six hundred forty".