212434298388 has 144 divisors (see below), whose sum is σ = 594262141200. Its totient is φ = 63561480192.

The previous prime is 212434298387. The next prime is 212434298399. The reversal of 212434298388 is 883892434212.

212434298388 is a `hidden beast` number, since 21 + 2 + 43 + 429 + 83 + 88 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 55822567824 + 156611730564 = 236268^2 + 395742^2 .

It is a super-2 number, since 2×212434298388² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212434298387) 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, 59721106 + ... + 59724662.

It is an arithmetic number, because the mean of its divisors is an integer number (4126820425).

Almost surely, 2^212434298388 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 212434298388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (297131070600).

212434298388 is an abundant number, since it is smaller than the sum of its proper divisors (381827842812).

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

212434298388 is a wasteful number, since it uses less digits than its factorization.

212434298388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7066 (or 7061 counting only the distinct ones).

The product of its digits is 5308416, while the sum is 54.

The spelling of 212434298388 in words is "two hundred twelve billion, four hundred thirty-four million, two hundred ninety-eight thousand, three hundred eighty-eight".