1229072660 has 48 divisors (see below), whose sum is σ = 2695835520. Its totient is φ = 470217600.

The previous prime is 1229072657. The next prime is 1229072683. The reversal of 1229072660 is 662709221.

It is a self number, because there is not a number n which added to its sum of digits gives 1229072660.

It is a congruent number.

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, 29585 + ... + 57735.

It is an arithmetic number, because the mean of its divisors is an integer number (56163240).

Almost surely, 2^1229072660 is an apocalyptic number.

1229072660 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 1229072660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1347917760).

1229072660 is an abundant number, since it is smaller than the sum of its proper divisors (1466762860).

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

1229072660 is a wasteful number, since it uses less digits than its factorization.

1229072660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28256 (or 28254 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 1229072660 is about 35058.1325800448. The cubic root of 1229072660 is about 1071.1719363161.

The spelling of 1229072660 in words is "one billion, two hundred twenty-nine million, seventy-two thousand, six hundred sixty".