210220380 has 48 divisors (see below), whose sum is σ = 654020640. Its totient is φ = 56058624.

The previous prime is 210220379. The next prime is 210220411. The reversal of 210220380 is 83022012.

It is a happy number.

210220380 is digitally balanced in base 3, 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 (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 194109 + ... + 195188.

It is an arithmetic number, because the mean of its divisors is an integer number (13625430).

Almost surely, 2^210220380 is an apocalyptic number.

210220380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210220380 is an abundant number, since it is smaller than the sum of its proper divisors (443800260).

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

210220380 is a wasteful number, since it uses less digits than its factorization.

210220380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389315 (or 389307 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 210220380 is about 14498.9785847142. The cubic root of 210220380 is about 594.6000466357.

Adding to 210220380 its reverse (83022012), we get a palindrome (293242392).

The spelling of 210220380 in words is "two hundred ten million, two hundred twenty thousand, three hundred eighty".