212069440 has 84 divisors (see below), whose sum is σ = 555173388. Its totient is φ = 77102080.

The previous prime is 212069371. The next prime is 212069443. The reversal of 212069440 is 44960212.

It can be written as a sum of positive squares in 2 ways, for example, as 167340096 + 44729344 = 12936^2 + 6688^2 .

It is a junction number, because it is equal to n+sod(n) for n = 212069399 and 212069408.

It is not an unprimeable number, because it can be changed into a prime (212069443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35982 + ... + 41458.

It is an arithmetic number, because the mean of its divisors is an integer number (6609207).

Almost surely, 2^212069440 is an apocalyptic number.

212069440 is a gapful number since it is divisible by the number (20) 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 212069440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (277586694).

212069440 is an abundant number, since it is smaller than the sum of its proper divisors (343103948).

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

212069440 is a wasteful number, since it uses less digits than its factorization.

212069440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5516 (or 5495 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 212069440 is about 14562.6041627176. The cubic root of 212069440 is about 596.3382912002.

The spelling of 212069440 in words is "two hundred twelve million, sixty-nine thousand, four hundred forty".