1187260720 has 40 divisors (see below), whose sum is σ = 2766006000. Its totient is φ = 473936640.

The previous prime is 1187260693. The next prime is 1187260721. The reversal of 1187260720 is 270627811.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (1187260721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25050 + ... + 54790.

It is an arithmetic number, because the mean of its divisors is an integer number (69150150).

Almost surely, 2^1187260720 is an apocalyptic number.

1187260720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1187260720 is an abundant number, since it is smaller than the sum of its proper divisors (1578745280).

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

1187260720 is a wasteful number, since it uses less digits than its factorization.

1187260720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30253 (or 30247 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 34.

The square root of 1187260720 is about 34456.6498661724. The cubic root of 1187260720 is about 1058.8847651198.

The spelling of 1187260720 in words is "one billion, one hundred eighty-seven million, two hundred sixty thousand, seven hundred twenty".