214640 has 20 divisors (see below), whose sum is σ = 499224. Its totient is φ = 85824.

The previous prime is 214639. The next prime is 214651. The reversal of 214640 is 46412.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 214640.

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, 1262 + ... + 1421.

2²¹⁴⁶⁴⁰ is an apocalyptic number.

214640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

214640 is an abundant number, since it is smaller than the sum of its proper divisors (284584).

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

214640 is a wasteful number, since it uses less digits than its factorization.

214640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2696 (or 2690 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 214640 is about 463.2925641536. The cubic root of 214640 is about 59.8738088567.

The spelling of 214640 in words is "two hundred fourteen thousand, six hundred forty".