1228705960 has 64 divisors (see below), whose sum is σ = 2859494400. Its totient is φ = 474878976.

The previous prime is 1228705897. The next prime is 1228705963. The reversal of 1228705960 is 695078221.

It is a super-2 number, since 2×1228705960² = 3019436672279043200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (1228705963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144384 + ... + 152656.

It is an arithmetic number, because the mean of its divisors is an integer number (44679600).

Almost surely, 2^1228705960 is an apocalyptic number.

1228705960 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 1228705960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1429747200).

1228705960 is an abundant number, since it is smaller than the sum of its proper divisors (1630788440).

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

1228705960 is a wasteful number, since it uses less digits than its factorization.

1228705960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8410 (or 8406 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 1228705960 is about 35052.9023049447. The cubic root of 1228705960 is about 1071.0653958777.

The spelling of 1228705960 in words is "one billion, two hundred twenty-eight million, seven hundred five thousand, nine hundred sixty".