1123609536 has 224 divisors, whose sum is σ = 3974592000. Its totient is φ = 304072704.

The previous prime is 1123609493. The next prime is 1123609537. The reversal of 1123609536 is 6359063211.

1123609536 is a `hidden beast` number, since 1 + 12 + 3 + 609 + 5 + 36 = 666.

It is a tau number, because it is divible by the number of its divisors (224).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1123609536.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123609537) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 227380 + ... + 232268.

Almost surely, 2^1123609536 is an apocalyptic number.

1123609536 is a gapful number since it is divisible by the number (16) 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 1123609536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1987296000).

1123609536 is an abundant number, since it is smaller than the sum of its proper divisors (2850982464).

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

1123609536 is a wasteful number, since it uses less digits than its factorization.

1123609536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4936 (or 4920 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 1123609536 is about 33520.2854403121. The cubic root of 1123609536 is about 1039.6132486991.

The spelling of 1123609536 in words is "one billion, one hundred twenty-three million, six hundred nine thousand, five hundred thirty-six".