1187168280 has 64 divisors (see below), whose sum is σ = 3611692800. Its totient is φ = 312117120.

The previous prime is 1187168263. The next prime is 1187168287. The reversal of 1187168280 is 828617811.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1187168287) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61150 + ... + 78189.

It is an arithmetic number, because the mean of its divisors is an integer number (56432700).

Almost surely, 2^1187168280 is an apocalyptic number.

1187168280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1187168280 is an abundant number, since it is smaller than the sum of its proper divisors (2424524520).

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

1187168280 is a wasteful number, since it uses less digits than its factorization.

1187168280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139424 (or 139420 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 42.

The square root of 1187168280 is about 34455.3084444183. The cubic root of 1187168280 is about 1058.8572828528.

The spelling of 1187168280 in words is "one billion, one hundred eighty-seven million, one hundred sixty-eight thousand, two hundred eighty".