213740 has 12 divisors (see below), whose sum is σ = 448896. Its totient is φ = 85488.

The previous prime is 213737. The next prime is 213751. The reversal of 213740 is 47312.

It is a happy number.

213740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5324 + ... + 5363.

It is an arithmetic number, because the mean of its divisors is an integer number (37408).

2²¹³⁷⁴⁰ is an apocalyptic number.

213740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213740 is an abundant number, since it is smaller than the sum of its proper divisors (235156).

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

213740 is a wasteful number, since it uses less digits than its factorization.

213740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10696 (or 10694 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 213740 is about 462.3202353348. The cubic root of 213740 is about 59.7900066447.

The spelling of 213740 in words is "two hundred thirteen thousand, seven hundred forty".