210040 has 32 divisors (see below), whose sum is σ = 486000. Its totient is φ = 81664.

The previous prime is 210037. The next prime is 210053. The reversal of 210040 is 40012.

210040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a plaindrome in base 14 and base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2316 + ... + 2404.

2²¹⁰⁰⁴⁰ is an apocalyptic number.

210040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 210040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243000).

210040 is an abundant number, since it is smaller than the sum of its proper divisors (275960).

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

210040 is a wasteful number, since it uses less digits than its factorization.

210040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159 (or 155 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 210040 is about 458.3012109956. The cubic root of 210040 is about 59.4429932067.

Adding to 210040 its reverse (40012), we get a palindrome (250052).

The spelling of 210040 in words is "two hundred ten thousand, forty", and thus it is an iban number.