1198728680 has 16 divisors (see below), whose sum is σ = 2697139620. Its totient is φ = 479491456.

The previous prime is 1198728679. The next prime is 1198728683. The reversal of 1198728680 is 868278911.

It can be written as a sum of positive squares in 2 ways, for example, as 1198682884 + 45796 = 34622^2 + 214^2 .

It is not an unprimeable number, because it can be changed into a prime (1198728683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14984069 + ... + 14984148.

Almost surely, 2^1198728680 is an apocalyptic number.

1198728680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1198728680 is an abundant number, since it is smaller than the sum of its proper divisors (1498410940).

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

1198728680 is a wasteful number, since it uses less digits than its factorization.

1198728680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29968228 (or 29968224 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 50.

The square root of 1198728680 is about 34622.6613650655. The cubic root of 1198728680 is about 1062.2831646093.

The spelling of 1198728680 in words is "one billion, one hundred ninety-eight million, seven hundred twenty-eight thousand, six hundred eighty".