210481380 has 36 divisors (see below), whose sum is σ = 638460732. Its totient is φ = 56128320.

The previous prime is 210481357. The next prime is 210481387. The reversal of 210481380 is 83184012.

It can be written as a sum of positive squares in 2 ways, for example, as 23503104 + 186978276 = 4848^2 + 13674^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×210481380² = 88604822653408800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210481387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 584491 + ... + 584850.

Almost surely, 2^210481380 is an apocalyptic number.

210481380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210481380 is an abundant number, since it is smaller than the sum of its proper divisors (427979352).

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

210481380 is a wasteful number, since it uses less digits than its factorization.

210481380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1169356 (or 1169351 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 210481380 is about 14507.9764267799. The cubic root of 210481380 is about 594.8460209327.

The spelling of 210481380 in words is "two hundred ten million, four hundred eighty-one thousand, three hundred eighty".