1229405328 has 60 divisors (see below), whose sum is σ = 3489115968. Its totient is φ = 404026560.

The previous prime is 1229405293. The next prime is 1229405413. The reversal of 1229405328 is 8235049221.

It is a happy number.

1229405328 is a `hidden beast` number, since 1 + 229 + 405 + 3 + 28 = 666.

It is a super-2 number, since 2×1229405328² = 3022874921029575168, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 1229405292 and 1229405301.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49900 + ... + 70347.

Almost surely, 2^1229405328 is an apocalyptic number.

1229405328 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1229405328 is an abundant number, since it is smaller than the sum of its proper divisors (2259710640).

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

1229405328 is a wasteful number, since it uses less digits than its factorization.

1229405328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120332 (or 120323 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 1229405328 is about 35062.8767787242. The cubic root of 1229405328 is about 1071.2685708201.

The spelling of 1229405328 in words is "one billion, two hundred twenty-nine million, four hundred five thousand, three hundred twenty-eight".