1131642888 has 64 divisors (see below), whose sum is σ = 2991288000. Its totient is φ = 355767552.

The previous prime is 1131642887. The next prime is 1131642913. The reversal of 1131642888 is 8882461311.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1131642881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99006 + ... + 109842.

It is an arithmetic number, because the mean of its divisors is an integer number (46738875).

Almost surely, 2^1131642888 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1131642888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1495644000).

1131642888 is an abundant number, since it is smaller than the sum of its proper divisors (1859645112).

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

1131642888 is a wasteful number, since it uses less digits than its factorization.

1131642888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11094 (or 11090 counting only the distinct ones).

The product of its digits is 73728, while the sum is 42.

The square root of 1131642888 is about 33639.9002376642. The cubic root of 1131642888 is about 1042.0849716357.

The spelling of 1131642888 in words is "one billion, one hundred thirty-one million, six hundred forty-two thousand, eight hundred eighty-eight".