213708 has 24 divisors (see below), whose sum is σ = 544320. Its totient is φ = 64720.

The previous prime is 213659. The next prime is 213713. The reversal of 213708 is 807312.

It is a super-2 number, since 2×213708² = 91342218528, which contains 22 as substring.

It is an unprimeable number.

213708 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 678 + ... + 941.

It is an arithmetic number, because the mean of its divisors is an integer number (22680).

2²¹³⁷⁰⁸ is an apocalyptic number.

It is an amenable number.

213708 is an abundant number, since it is smaller than the sum of its proper divisors (330612).

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

213708 is a wasteful number, since it uses less digits than its factorization.

213708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1637 (or 1635 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 213708 is about 462.2856259933. The cubic root of 213708 is about 59.7870226833.

The spelling of 213708 in words is "two hundred thirteen thousand, seven hundred eight".