1158184640 has 28 divisors (see below), whose sum is σ = 2757927936. Its totient is φ = 463273728.

The previous prime is 1158184631. The next prime is 1158184649. The reversal of 1158184640 is 464818511.

It is an interprime number because it is at equal distance from previous prime (1158184631) and next prime (1158184649).

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1158184594 and 1158184603.

It is not an unprimeable number, because it can be changed into a prime (1158184649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1809344 + ... + 1809983.

Almost surely, 2^1158184640 is an apocalyptic number.

1158184640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1158184640 is an abundant number, since it is smaller than the sum of its proper divisors (1599743296).

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

1158184640 is an equidigital number, since it uses as much as digits as its factorization.

1158184640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3619344 (or 3619334 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 38.

The square root of 1158184640 is about 34032.1118945034. Note that the first 3 decimals coincide. The cubic root of 1158184640 is about 1050.1691760667.

The spelling of 1158184640 in words is "one billion, one hundred fifty-eight million, one hundred eighty-four thousand, six hundred forty".