1197857772 has 18 divisors (see below), whose sum is σ = 3027918348. Its totient is φ = 399285912.

The previous prime is 1197857737. The next prime is 1197857809. The reversal of 1197857772 is 2777587911.

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16636878 + ... + 16636949.

It is an arithmetic number, because the mean of its divisors is an integer number (168217686).

Almost surely, 2^1197857772 is an apocalyptic number.

1197857772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1197857772 is an abundant number, since it is smaller than the sum of its proper divisors (1830060576).

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

1197857772 is a wasteful number, since it uses less digits than its factorization.

1197857772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33273837 (or 33273832 counting only the distinct ones).

The product of its digits is 1728720, while the sum is 54.

The square root of 1197857772 is about 34610.0819415384. The cubic root of 1197857772 is about 1062.0258433708.

The spelling of 1197857772 in words is "one billion, one hundred ninety-seven million, eight hundred fifty-seven thousand, seven hundred seventy-two".