212433390 has 96 divisors (see below), whose sum is σ = 614105856. Its totient is φ = 50595840.

The previous prime is 212433383. The next prime is 212433407. The reversal of 212433390 is 93334212.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 33342 + ... + 39198.

It is an arithmetic number, because the mean of its divisors is an integer number (6396936).

Almost surely, 2^212433390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212433390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (307052928).

212433390 is an abundant number, since it is smaller than the sum of its proper divisors (401672466).

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

212433390 is a wasteful number, since it uses less digits than its factorization.

212433390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5914 (or 5911 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 212433390 is about 14575.0948538937. The cubic root of 212433390 is about 596.6792381415.

The spelling of 212433390 in words is "two hundred twelve million, four hundred thirty-three thousand, three hundred ninety".