1229489664 has 160 divisors (see below), whose sum is σ = 3583937280. Its totient is φ = 372252672.

The previous prime is 1229489609. The next prime is 1229489671. The reversal of 1229489664 is 4669849221.

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, 1337397 + ... + 1338315.

It is an arithmetic number, because the mean of its divisors is an integer number (22399608).

Almost surely, 2^1229489664 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 1229489664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1791968640).

1229489664 is an abundant number, since it is smaller than the sum of its proper divisors (2354447616).

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

1229489664 is an equidigital number, since it uses as much as digits as its factorization.

1229489664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020 (or 1004 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 51.

The square root of 1229489664 is about 35064.0793975829. The cubic root of 1229489664 is about 1071.2930662511.

The spelling of 1229489664 in words is "one billion, two hundred twenty-nine million, four hundred eighty-nine thousand, six hundred sixty-four".