1149891660 has 96 divisors (see below), whose sum is σ = 3653637120. Its totient is φ = 300106944.

The previous prime is 1149891653. The next prime is 1149891703. The reversal of 1149891660 is 661989411.

1149891660 is a `hidden beast` number, since 11 + 498 + 91 + 6 + 60 = 666.

It is a super-4 number, since 4×1149891660⁴ (a number of 37 digits) contains 4444 as substring.

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

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 31 ways as a sum of consecutive naturals, for example, 2727 + ... + 48033.

It is an arithmetic number, because the mean of its divisors is an integer number (38058720).

Almost surely, 2^1149891660 is an apocalyptic number.

1149891660 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 1149891660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1826818560).

1149891660 is an abundant number, since it is smaller than the sum of its proper divisors (2503745460).

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

1149891660 is a wasteful number, since it uses less digits than its factorization.

1149891660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45372 (or 45364 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The square root of 1149891660 is about 33910.0524918497. The cubic root of 1149891660 is about 1047.6566516497.

The spelling of 1149891660 in words is "one billion, one hundred forty-nine million, eight hundred ninety-one thousand, six hundred sixty".