1213086888 has 128 divisors (see below), whose sum is σ = 3654201600. Its totient is φ = 370656000.

The previous prime is 1213086881. The next prime is 1213086989. The reversal of 1213086888 is 8886803121.

It is not an unprimeable number, because it can be changed into a prime (1213086881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 422578 + ... + 425438.

It is an arithmetic number, because the mean of its divisors is an integer number (28548450).

Almost surely, 2^1213086888 is an apocalyptic number.

1213086888 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 1213086888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1827100800).

1213086888 is an abundant number, since it is smaller than the sum of its proper divisors (2441114712).

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

1213086888 is a wasteful number, since it uses less digits than its factorization.

1213086888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3040 (or 3030 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 45.

The square root of 1213086888 is about 34829.3968940032. The cubic root of 1213086888 is about 1066.5076366211.

The spelling of 1213086888 in words is "one billion, two hundred thirteen million, eighty-six thousand, eight hundred eighty-eight".