1123297650 has 144 divisors (see below), whose sum is σ = 3110050944. Its totient is φ = 290528640.

The previous prime is 1123297639. The next prime is 1123297657. The reversal of 1123297650 is 567923211.

It is a super-2 number, since 2×1123297650² = 2523595220991045000, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1123297657) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3658797 + ... + 3659103.

It is an arithmetic number, because the mean of its divisors is an integer number (21597576).

Almost surely, 2^1123297650 is an apocalyptic number.

1123297650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1123297650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1555025472).

1123297650 is an abundant number, since it is smaller than the sum of its proper divisors (1986753294).

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

1123297650 is a wasteful number, since it uses less digits than its factorization.

1123297650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545 (or 537 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 1123297650 is about 33515.6329195795. The cubic root of 1123297650 is about 1039.5170495563.

The spelling of 1123297650 in words is "one billion, one hundred twenty-three million, two hundred ninety-seven thousand, six hundred fifty".