1186631020 has 48 divisors (see below), whose sum is σ = 2635105536. Its totient is φ = 448128000.

The previous prime is 1186631003. The next prime is 1186631071. The reversal of 1186631020 is 201366811.

It is a self number, because there is not a number n which added to its sum of digits gives 1186631020.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2080 + ... + 48760.

It is an arithmetic number, because the mean of its divisors is an integer number (54898032).

Almost surely, 2^1186631020 is an apocalyptic number.

1186631020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1186631020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1317552768).

1186631020 is an abundant number, since it is smaller than the sum of its proper divisors (1448474516).

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

1186631020 is a wasteful number, since it uses less digits than its factorization.

1186631020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46762 (or 46760 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 1186631020 is about 34447.5110857084. The cubic root of 1186631020 is about 1058.6975280503.

Adding to 1186631020 its reverse (201366811), we get a palindrome (1387997831).

The spelling of 1186631020 in words is "one billion, one hundred eighty-six million, six hundred thirty-one thousand, twenty".