1228249992 has 32 divisors (see below), whose sum is σ = 3176510400. Its totient is φ = 395298624.

The previous prime is 1228249969. The next prime is 1228250029. The reversal of 1228249992 is 2999428221.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 881668 + ... + 883059.

It is an arithmetic number, because the mean of its divisors is an integer number (99265950).

Almost surely, 2^1228249992 is an apocalyptic number.

1228249992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1228249992 is an abundant number, since it is smaller than the sum of its proper divisors (1948260408).

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

1228249992 is a wasteful number, since it uses less digits than its factorization.

1228249992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1764765 (or 1764761 counting only the distinct ones).

The product of its digits is 373248, while the sum is 48.

The square root of 1228249992 is about 35046.3977036157. The cubic root of 1228249992 is about 1070.9328900855.

The spelling of 1228249992 in words is "one billion, two hundred twenty-eight million, two hundred forty-nine thousand, nine hundred ninety-two".