1228748466 has 96 divisors (see below), whose sum is σ = 2801937600. Its totient is φ = 358680960.

The previous prime is 1228748431. The next prime is 1228748489. The reversal of 1228748466 is 6648478221.

1228748466 = 5263² + 5264² + ... + 5306².

1228748466 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4002285 + ... + 4002591.

It is an arithmetic number, because the mean of its divisors is an integer number (29186850).

Almost surely, 2^1228748466 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1228748466, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1400968800).

1228748466 is an abundant number, since it is smaller than the sum of its proper divisors (1573189134).

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

1228748466 is a wasteful number, since it uses less digits than its factorization.

1228748466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520 (or 509 counting only the distinct ones).

The product of its digits is 1032192, while the sum is 48.

The square root of 1228748466 is about 35053.5086118351. The cubic root of 1228748466 is about 1071.0777465898.

The spelling of 1228748466 in words is "one billion, two hundred twenty-eight million, seven hundred forty-eight thousand, four hundred sixty-six".