1229378046 has 32 divisors (see below), whose sum is σ = 2649392928. Its totient is φ = 378055680.

The previous prime is 1229378039. The next prime is 1229378047. The reversal of 1229378046 is 6408739221.

It is a super-2 number, since 2×1229378046² = 3022740759973556232, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1229377989 and 1229378007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1229378047) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 185266 + ... + 191786.

It is an arithmetic number, because the mean of its divisors is an integer number (82793529).

Almost surely, 2^1229378046 is an apocalyptic number.

1229378046 is an abundant number, since it is smaller than the sum of its proper divisors (1420014882).

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

1229378046 is a wasteful number, since it uses less digits than its factorization.

1229378046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8956.

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 1229378046 is about 35062.4877326182. The cubic root of 1229378046 is about 1071.2606465105.

The spelling of 1229378046 in words is "one billion, two hundred twenty-nine million, three hundred seventy-eight thousand, forty-six".