1181978588 has 18 divisors (see below), whose sum is σ = 2406171096. Its totient is φ = 506562168.

The previous prime is 1181978587. The next prime is 1181978593. The reversal of 1181978588 is 8858791811.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1181978587) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3015056 + ... + 3015447.

It is an arithmetic number, because the mean of its divisors is an integer number (133676172).

Almost surely, 2^1181978588 is an apocalyptic number.

It is an amenable number.

1181978588 is an abundant number, since it is smaller than the sum of its proper divisors (1224192508).

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

1181978588 is a wasteful number, since it uses less digits than its factorization.

1181978588 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6030521 (or 6030512 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 56.

The square root of 1181978588 is about 34379.9154740089. The cubic root of 1181978588 is about 1057.3121017459.

The spelling of 1181978588 in words is "one billion, one hundred eighty-one million, nine hundred seventy-eight thousand, five hundred eighty-eight".