1123390912 has 56 divisors (see below), whose sum is σ = 2552435840. Its totient is φ = 480556800.

The previous prime is 1123390907. The next prime is 1123390921. The reversal of 1123390912 is 2190933211.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275287 + ... + 279337.

Almost surely, 2^1123390912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1123390912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1276217920).

1123390912 is an abundant number, since it is smaller than the sum of its proper divisors (1429044928).

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

1123390912 is an equidigital number, since it uses as much as digits as its factorization.

1123390912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4689 (or 4679 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 1123390912 is about 33517.0242115854. The cubic root of 1123390912 is about 1039.5458174601.

It can be divided in two parts, 112 and 3390912, that multiplied together give a square (379782144 = 19488²).

The spelling of 1123390912 in words is "one billion, one hundred twenty-three million, three hundred ninety thousand, nine hundred twelve".