1188161250 has 80 divisors (see below), whose sum is σ = 3014410080. Its totient is φ = 312048000.

The previous prime is 1188161243. The next prime is 1188161267. The reversal of 1188161250 is 521618811.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 248886 + ... + 253614.

It is an arithmetic number, because the mean of its divisors is an integer number (37680126).

Almost surely, 2^1188161250 is an apocalyptic number.

1188161250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1188161250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1507205040).

1188161250 is an abundant number, since it is smaller than the sum of its proper divisors (1826248830).

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

1188161250 is an equidigital number, since it uses as much as digits as its factorization.

1188161250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4821 (or 4806 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 33.

The square root of 1188161250 is about 34469.7149683603. The cubic root of 1188161250 is about 1059.1524166681.

The spelling of 1188161250 in words is "one billion, one hundred eighty-eight million, one hundred sixty-one thousand, two hundred fifty".