1229979520 has 192 divisors, whose sum is σ = 3695378400. Its totient is φ = 383201280.

The previous prime is 1229979503. The next prime is 1229979551. The reversal of 1229979520 is 259799221.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 540946 + ... + 543214.

Almost surely, 2^1229979520 is an apocalyptic number.

1229979520 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 1229979520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1847689200).

1229979520 is an abundant number, since it is smaller than the sum of its proper divisors (2465398880).

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

1229979520 is a wasteful number, since it uses less digits than its factorization.

1229979520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2317 (or 2294 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 46.

The square root of 1229979520 is about 35071.0638561193. The cubic root of 1229979520 is about 1071.4353230135.

It can be divided in two parts, 12299 and 79520, that added together give a palindrome (91819).

The spelling of 1229979520 in words is "one billion, two hundred twenty-nine million, nine hundred seventy-nine thousand, five hundred twenty".