1223465520 has 160 divisors (see below), whose sum is σ = 4056972480. Its totient is φ = 303923200.

The previous prime is 1223465513. The next prime is 1223465521. The reversal of 1223465520 is 255643221.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (1223465521) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 410596 + ... + 413564.

It is an arithmetic number, because the mean of its divisors is an integer number (25356078).

Almost surely, 2^1223465520 is an apocalyptic number.

1223465520 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 1223465520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2028486240).

1223465520 is an abundant number, since it is smaller than the sum of its proper divisors (2833506960).

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

1223465520 is a wasteful number, since it uses less digits than its factorization.

1223465520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3103 (or 3097 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 1223465520 is about 34978.0719880327. The cubic root of 1223465520 is about 1069.5405253477.

The spelling of 1223465520 in words is "one billion, two hundred twenty-three million, four hundred sixty-five thousand, five hundred twenty".