1223729960 has 64 divisors (see below), whose sum is σ = 2991859200. Its totient is φ = 448761600.

The previous prime is 1223729957. The next prime is 1223730031. The reversal of 1223729960 is 699273221.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2411 + ... + 49530.

It is an arithmetic number, because the mean of its divisors is an integer number (46747800).

Almost surely, 2^1223729960 is an apocalyptic number.

1223729960 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 1223729960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1495929600).

1223729960 is an abundant number, since it is smaller than the sum of its proper divisors (1768129240).

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

1223729960 is a wasteful number, since it uses less digits than its factorization.

1223729960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52002 (or 51998 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 1223729960 is about 34981.8518663606. The cubic root of 1223729960 is about 1069.6175766737.

The spelling of 1223729960 in words is "one billion, two hundred twenty-three million, seven hundred twenty-nine thousand, nine hundred sixty".