1228908240 has 480 divisors, whose sum is σ = 5221272960. Its totient is φ = 263983104.

The previous prime is 1228908203. The next prime is 1228908271. The reversal of 1228908240 is 428098221.

1228908240 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1228908195 and 1228908204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1798939 + ... + 1799621.

It is an arithmetic number, because the mean of its divisors is an integer number (10877652).

Almost surely, 2^1228908240 is an apocalyptic number.

1228908240 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 1228908240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2610636480).

1228908240 is an abundant number, since it is smaller than the sum of its proper divisors (3992364720).

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

1228908240 is a wasteful number, since it uses less digits than its factorization.

1228908240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736 (or 717 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 1228908240 is about 35055.7875392923. The cubic root of 1228908240 is about 1071.1241686102.

The spelling of 1228908240 in words is "one billion, two hundred twenty-eight million, nine hundred eight thousand, two hundred forty".