1133523720 has 640 divisors, whose sum is σ = 4742115840. Its totient is φ = 237219840.

The previous prime is 1133523719. The next prime is 1133523737. The reversal of 1133523720 is 273253311.

1133523720 is a `hidden beast` number, since 1 + 133 + 523 + 7 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 21387214 + ... + 21387266.

It is an arithmetic number, because the mean of its divisors is an integer number (7409556).

Almost surely, 2^1133523720 is an apocalyptic number.

1133523720 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 1133523720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2371057920).

1133523720 is an abundant number, since it is smaller than the sum of its proper divisors (3608592120).

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

1133523720 is a wasteful number, since it uses less digits than its factorization.

1133523720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147 (or 134 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 27.

The square root of 1133523720 is about 33667.8440058166. The cubic root of 1133523720 is about 1042.6619799030.

The spelling of 1133523720 in words is "one billion, one hundred thirty-three million, five hundred twenty-three thousand, seven hundred twenty".