1201647680 has 112 divisors (see below), whose sum is σ = 2977140096. Its totient is φ = 461598720.

The previous prime is 1201647679. The next prime is 1201647697. The reversal of 1201647680 is 867461021.

It is a self number, because there is not a number n which added to its sum of digits gives 1201647680.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 878357 + ... + 879723.

It is an arithmetic number, because the mean of its divisors is an integer number (26581608).

Almost surely, 2^1201647680 is an apocalyptic number.

1201647680 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 1201647680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1488570048).

1201647680 is an abundant number, since it is smaller than the sum of its proper divisors (1775492416).

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

1201647680 is a wasteful number, since it uses less digits than its factorization.

1201647680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1492 (or 1482 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 1201647680 is about 34664.7902056251. The cubic root of 1201647680 is about 1063.1447137673.

The spelling of 1201647680 in words is "one billion, two hundred one million, six hundred forty-seven thousand, six hundred eighty".