212108490 has 128 divisors (see below), whose sum is σ = 653495040. Its totient is φ = 48384000.

The previous prime is 212108489. The next prime is 212108497. The reversal of 212108490 is 94801212.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

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

It is not an unprimeable number, because it can be changed into a prime (212108497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 48390 + ... + 52590.

It is an arithmetic number, because the mean of its divisors is an integer number (5105430).

Almost surely, 2^212108490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212108490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (326747520).

212108490 is an abundant number, since it is smaller than the sum of its proper divisors (441386550).

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

212108490 is a wasteful number, since it uses less digits than its factorization.

212108490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4245 (or 4239 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 212108490 is about 14563.9448639440. The cubic root of 212108490 is about 596.3748917606.

The spelling of 212108490 in words is "two hundred twelve million, one hundred eight thousand, four hundred ninety".