1229644992 has 28 divisors (see below), whose sum is σ = 3253436216. Its totient is φ = 409881600.

The previous prime is 1229644991. The next prime is 1229645029. The reversal of 1229644992 is 2994469221.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (1229644991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3202009 + ... + 3202392.

Almost surely, 2^1229644992 is an apocalyptic number.

1229644992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1229644992 is an abundant number, since it is smaller than the sum of its proper divisors (2023791224).

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

1229644992 is an equidigital number, since it uses as much as digits as its factorization.

1229644992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6404416 (or 6404406 counting only the distinct ones).

The product of its digits is 559872, while the sum is 48.

The square root of 1229644992 is about 35066.2942439032. The cubic root of 1229644992 is about 1071.3381784109.

The spelling of 1229644992 in words is "one billion, two hundred twenty-nine million, six hundred forty-four thousand, nine hundred ninety-two".