1229520240 has 240 divisors, whose sum is σ = 4708948608. Its totient is φ = 284811264.

The previous prime is 1229520211. The next prime is 1229520287. The reversal of 1229520240 is 420259221.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (240).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 155257 + ... + 162983.

Almost surely, 2^1229520240 is an apocalyptic number.

1229520240 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 1229520240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2354474304).

1229520240 is an abundant number, since it is smaller than the sum of its proper divisors (3479428368).

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

1229520240 is a wasteful number, since it uses less digits than its factorization.

1229520240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7776 (or 7767 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 1229520240 is about 35064.5153966228. The cubic root of 1229520240 is about 1071.3019467881.

Adding to 1229520240 its reverse (420259221), we get a palindrome (1649779461).

The spelling of 1229520240 in words is "one billion, two hundred twenty-nine million, five hundred twenty thousand, two hundred forty".