1327690188 has 144 divisors (see below), whose sum is σ = 3787719936. Its totient is φ = 388644480.

The previous prime is 1327690187. The next prime is 1327690207. The reversal of 1327690188 is 8810967231.

It is a super-2 number, since 2×1327690188² = 3525522470622950688, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1327690181) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1753506 + ... + 1754262.

Almost surely, 2^1327690188 is an apocalyptic number.

1327690188 is a gapful number since it is divisible by the number (18) 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 1327690188, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1893859968).

1327690188 is an abundant number, since it is smaller than the sum of its proper divisors (2460029748).

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

1327690188 is a wasteful number, since it uses less digits than its factorization.

1327690188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 924 (or 919 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 1327690188 is about 36437.4832830150. The cubic root of 1327690188 is about 1099.0874492255.

The spelling of 1327690188 in words is "one billion, three hundred twenty-seven million, six hundred ninety thousand, one hundred eighty-eight".