1229251680 has 384 divisors, whose sum is σ = 4540354560. Its totient is φ = 310210560.

The previous prime is 1229251679. The next prime is 1229251697. The reversal of 1229251680 is 861529221.

It is a super-2 number, since 2×1229251680² = 3022119385565644800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8972572 + ... + 8972708.

It is an arithmetic number, because the mean of its divisors is an integer number (11823840).

Almost surely, 2^1229251680 is an apocalyptic number.

1229251680 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 1229251680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2270177280).

1229251680 is an abundant number, since it is smaller than the sum of its proper divisors (3311102880).

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

1229251680 is a wasteful number, since it uses less digits than its factorization.

1229251680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259 (or 245 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 1229251680 is about 35060.6856749836. The cubic root of 1229251680 is about 1071.2239408061.

The spelling of 1229251680 in words is "one billion, two hundred twenty-nine million, two hundred fifty-one thousand, six hundred eighty".