1181267680 has 48 divisors (see below), whose sum is σ = 2794647744. Its totient is φ = 471846400.

The previous prime is 1181267651. The next prime is 1181267699. The reversal of 1181267680 is 867621811.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118905 + ... + 128455.

It is an arithmetic number, because the mean of its divisors is an integer number (58221828).

Almost surely, 2^1181267680 is an apocalyptic number.

1181267680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1181267680 is an abundant number, since it is smaller than the sum of its proper divisors (1613380064).

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

1181267680 is an equidigital number, since it uses as much as digits as its factorization.

1181267680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10339 (or 10331 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 40.

The square root of 1181267680 is about 34369.5749173597. The cubic root of 1181267680 is about 1057.1000836984.

The spelling of 1181267680 in words is "one billion, one hundred eighty-one million, two hundred sixty-seven thousand, six hundred eighty".