1228161960 has 128 divisors (see below), whose sum is σ = 4117392000. Its totient is φ = 325628928.

The previous prime is 1228161959. The next prime is 1228161971. The reversal of 1228161960 is 691618221.

1228161960 is a `hidden beast` number, since 12 + 28 + 1 + 619 + 6 + 0 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 190144 + ... + 196496.

It is an arithmetic number, because the mean of its divisors is an integer number (32167125).

Almost surely, 2^1228161960 is an apocalyptic number.

1228161960 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 1228161960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2058696000).

1228161960 is an abundant number, since it is smaller than the sum of its proper divisors (2889230040).

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

1228161960 is a wasteful number, since it uses less digits than its factorization.

1228161960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6552 (or 6542 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 1228161960 is about 35045.1417460395. The cubic root of 1228161960 is about 1070.9073039217.

The spelling of 1228161960 in words is "one billion, two hundred twenty-eight million, one hundred sixty-one thousand, nine hundred sixty".