1123156460 has 48 divisors (see below), whose sum is σ = 2481524640. Its totient is φ = 426447360.

The previous prime is 1123156451. The next prime is 1123156471. The reversal of 1123156460 is 646513211.

It is a happy number.

It is a super-2 number, since 2×1123156460² = 2522960867279463200, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 11831 + ... + 48849.

It is an arithmetic number, because the mean of its divisors is an integer number (51698430).

Almost surely, 2^1123156460 is an apocalyptic number.

1123156460 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 1123156460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1240762320).

1123156460 is an abundant number, since it is smaller than the sum of its proper divisors (1358368180).

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

1123156460 is a wasteful number, since it uses less digits than its factorization.

1123156460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37106 (or 37104 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1123156460 is about 33513.5265228833. The cubic root of 1123156460 is about 1039.4734945936.

Adding to 1123156460 its reverse (646513211), we get a palindrome (1769669671).

The spelling of 1123156460 in words is "one billion, one hundred twenty-three million, one hundred fifty-six thousand, four hundred sixty".