1229903680 has 112 divisors (see below), whose sum is σ = 3038642640. Its totient is φ = 473776128.

The previous prime is 1229903671. The next prime is 1229903681. The reversal of 1229903680 is 863099221.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 56430144 + 1173473536 = 7512^2 + 34256^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1229903681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1290084 + ... + 1291036.

Almost surely, 2^1229903680 is an apocalyptic number.

1229903680 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 1229903680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1519321320).

1229903680 is an abundant number, since it is smaller than the sum of its proper divisors (1808738960).

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

1229903680 is a wasteful number, since it uses less digits than its factorization.

1229903680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1116 (or 1106 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 1229903680 is about 35069.9826062118. The cubic root of 1229903680 is about 1071.4133011496.

The spelling of 1229903680 in words is "one billion, two hundred twenty-nine million, nine hundred three thousand, six hundred eighty".