1228492980 has 240 divisors, whose sum is σ = 4528427904. Its totient is φ = 274855680.

The previous prime is 1228492973. The next prime is 1228493009. The reversal of 1228492980 is 892948221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

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 79 ways as a sum of consecutive naturals, for example, 229009 + ... + 234311.

Almost surely, 2^1228492980 is an apocalyptic number.

1228492980 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 1228492980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2264213952).

1228492980 is an abundant number, since it is smaller than the sum of its proper divisors (3299934924).

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

1228492980 is a wasteful number, since it uses less digits than its factorization.

1228492980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5348 (or 5337 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 1228492980 is about 35049.8641937455. The cubic root of 1228492980 is about 1071.0035072738.

The spelling of 1228492980 in words is "one billion, two hundred twenty-eight million, four hundred ninety-two thousand, nine hundred eighty".