1228988580 has 48 divisors (see below), whose sum is σ = 3488319744. Its totient is φ = 323239680.

The previous prime is 1228988573. The next prime is 1228988581. The reversal of 1228988580 is 858898221.

It is not an unprimeable number, because it can be changed into a prime (1228988581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135916 + ... + 144675.

It is an arithmetic number, because the mean of its divisors is an integer number (72673328).

Almost surely, 2^1228988580 is an apocalyptic number.

1228988580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1228988580 is an abundant number, since it is smaller than the sum of its proper divisors (2259331164).

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

1228988580 is a wasteful number, since it uses less digits than its factorization.

1228988580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280676 (or 280674 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 51.

The square root of 1228988580 is about 35056.9334083859. The cubic root of 1228988580 is about 1071.1475097184.

The spelling of 1228988580 in words is "one billion, two hundred twenty-eight million, nine hundred eighty-eight thousand, five hundred eighty".