1228679280 has 200 divisors, whose sum is σ = 4303867392. Its totient is φ = 324850176.

The previous prime is 1228679237. The next prime is 1228679293. The reversal of 1228679280 is 829768221.

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 polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 822214 + ... + 823706.

Almost surely, 2^1228679280 is an apocalyptic number.

1228679280 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 1228679280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2151933696).

1228679280 is an abundant number, since it is smaller than the sum of its proper divisors (3075188112).

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

1228679280 is a wasteful number, since it uses less digits than its factorization.

1228679280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1645 (or 1630 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 1228679280 is about 35052.5217352475. The cubic root of 1228679280 is about 1071.0576434855.

The spelling of 1228679280 in words is "one billion, two hundred twenty-eight million, six hundred seventy-nine thousand, two hundred eighty".