1187761216 has 28 divisors (see below), whose sum is σ = 2459443392. Its totient is φ = 568059008.

The previous prime is 1187761213. The next prime is 1187761229. The reversal of 1187761216 is 6121677811.

It is not an unprimeable number, because it can be changed into a prime (1187761213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 401980 + ... + 404923.

It is an arithmetic number, because the mean of its divisors is an integer number (87837264).

Almost surely, 2^1187761216 is an apocalyptic number.

1187761216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1187761216 is an abundant number, since it is smaller than the sum of its proper divisors (1271682176).

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

1187761216 is an equidigital number, since it uses as much as digits as its factorization.

1187761216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 806938 (or 806928 counting only the distinct ones).

The product of its digits is 28224, while the sum is 40.

The square root of 1187761216 is about 34463.9117919020. The cubic root of 1187761216 is about 1059.0335370303.

The spelling of 1187761216 in words is "one billion, one hundred eighty-seven million, seven hundred sixty-one thousand, two hundred sixteen".