1188545980 has 12 divisors (see below), whose sum is σ = 2495946600. Its totient is φ = 475418384.

The previous prime is 1188545971. The next prime is 1188545989. The reversal of 1188545980 is 895458811.

It is an interprime number because it is at equal distance from previous prime (1188545971) and next prime (1188545989).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1188545989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29713630 + ... + 29713669.

It is an arithmetic number, because the mean of its divisors is an integer number (207995550).

Almost surely, 2^1188545980 is an apocalyptic number.

1188545980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1188545980 is an abundant number, since it is smaller than the sum of its proper divisors (1307400620).

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

1188545980 is a wasteful number, since it uses less digits than its factorization.

1188545980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59427308 (or 59427306 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 49.

The square root of 1188545980 is about 34475.2952126592. The cubic root of 1188545980 is about 1059.2667231887.

The spelling of 1188545980 in words is "one billion, one hundred eighty-eight million, five hundred forty-five thousand, nine hundred eighty".