1212826888 has 128 divisors (see below), whose sum is σ = 2939811840. Its totient is φ = 456192000.

The previous prime is 1212826883. The next prime is 1212826969. The reversal of 1212826888 is 8886282121.

It is not an unprimeable number, because it can be changed into a prime (1212826883) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1376208 + ... + 1377088.

It is an arithmetic number, because the mean of its divisors is an integer number (22967280).

Almost surely, 2^1212826888 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 1212826888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1469905920).

1212826888 is an abundant number, since it is smaller than the sum of its proper divisors (1726984952).

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

1212826888 is a wasteful number, since it uses less digits than its factorization.

1212826888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999 (or 995 counting only the distinct ones).

The product of its digits is 196608, while the sum is 46.

The square root of 1212826888 is about 34825.6642147713. The cubic root of 1212826888 is about 1066.4314365838.

It can be divided in two parts, 1212 and 826888, that added together give a square (828100 = 910²).

The spelling of 1212826888 in words is "one billion, two hundred twelve million, eight hundred twenty-six thousand, eight hundred eighty-eight".