1197780976 has 160 divisors (see below), whose sum is σ = 2935685120. Its totient is φ = 461894400.

The previous prime is 1197780971. The next prime is 1197780977. The reversal of 1197780976 is 6790877911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1197780971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4419721 + ... + 4419991.

It is an arithmetic number, because the mean of its divisors is an integer number (18348032).

Almost surely, 2^1197780976 is an apocalyptic number.

1197780976 is a gapful number since it is divisible by the number (16) 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 1197780976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1467842560).

1197780976 is an abundant number, since it is smaller than the sum of its proper divisors (1737904144).

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

1197780976 is a wasteful number, since it uses less digits than its factorization.

1197780976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403 (or 397 counting only the distinct ones).

The product of its (nonzero) digits is 1333584, while the sum is 55.

The square root of 1197780976 is about 34608.9724782462. The cubic root of 1197780976 is about 1062.0031469980.

The spelling of 1197780976 in words is "one billion, one hundred ninety-seven million, seven hundred eighty thousand, nine hundred seventy-six".