212940090 has 80 divisors (see below), whose sum is σ = 624650400. Its totient is φ = 51619680.

The previous prime is 212940089. The next prime is 212940109. The reversal of 212940090 is 90049212.

212940090 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3040 + ... + 20859.

It is an arithmetic number, because the mean of its divisors is an integer number (7808130).

Almost surely, 2^212940090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212940090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (312325200).

212940090 is an abundant number, since it is smaller than the sum of its proper divisors (411710310).

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

212940090 is a wasteful number, since it uses less digits than its factorization.

212940090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23929 (or 23920 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 212940090 is about 14592.4668922016. The cubic root of 212940090 is about 597.1532648592.

The spelling of 212940090 in words is "two hundred twelve million, nine hundred forty thousand, ninety".