1228387980 has 48 divisors (see below), whose sum is σ = 3441967200. Its totient is φ = 327333888.

The previous prime is 1228387973. The next prime is 1228388011. The reversal of 1228387980 is 897838221.

1228387980 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86332 + ... + 99548.

It is an arithmetic number, because the mean of its divisors is an integer number (71707650).

Almost surely, 2^1228387980 is an apocalyptic number.

1228387980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1228387980 is an abundant number, since it is smaller than the sum of its proper divisors (2213579220).

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

1228387980 is a wasteful number, since it uses less digits than its factorization.

1228387980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14778 (or 14776 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 48.

The square root of 1228387980 is about 35048.3662957348. The cubic root of 1228387980 is about 1070.9729933096.

The spelling of 1228387980 in words is "one billion, two hundred twenty-eight million, three hundred eighty-seven thousand, nine hundred eighty".