1229430240 has 144 divisors (see below), whose sum is σ = 4330924416. Its totient is φ = 317260800.

The previous prime is 1229430227. The next prime is 1229430281. The reversal of 1229430240 is 420349221.

1229430240 is a `hidden beast` number, since 1 + 229 + 430 + 2 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×1229430240² = 3022997430052915200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30870 + ... + 58410.

It is an arithmetic number, because the mean of its divisors is an integer number (30075864).

Almost surely, 2^1229430240 is an apocalyptic number.

1229430240 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 1229430240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2165462208).

1229430240 is an abundant number, since it is smaller than the sum of its proper divisors (3101494176).

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

1229430240 is a wasteful number, since it uses less digits than its factorization.

1229430240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27593 (or 27582 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 1229430240 is about 35063.2320244441. The cubic root of 1229430240 is about 1071.2758066388.

Adding to 1229430240 its reverse (420349221), we get a palindrome (1649779461).

The spelling of 1229430240 in words is "one billion, two hundred twenty-nine million, four hundred thirty thousand, two hundred forty".