213489660 has 48 divisors (see below), whose sum is σ = 598582656. Its totient is φ = 56853312.

The previous prime is 213489637. The next prime is 213489701. The reversal of 213489660 is 66984312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52459 + ... + 56381.

It is an arithmetic number, because the mean of its divisors is an integer number (12470472).

Almost surely, 2^213489660 is an apocalyptic number.

213489660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213489660 is an abundant number, since it is smaller than the sum of its proper divisors (385092996).

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

213489660 is a wasteful number, since it uses less digits than its factorization.

213489660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4842 (or 4840 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 213489660 is about 14611.2853644024. The cubic root of 213489660 is about 597.6665478776. Note that the first 3 decimals are identical.

The spelling of 213489660 in words is "two hundred thirteen million, four hundred eighty-nine thousand, six hundred sixty".