213720860 has 12 divisors (see below), whose sum is σ = 448813848. Its totient is φ = 85488336.

The previous prime is 213720847. The next prime is 213720869. The reversal of 213720860 is 68027312.

It is a happy number.

213720860 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213720869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5343002 + ... + 5343041.

It is an arithmetic number, because the mean of its divisors is an integer number (37401154).

Almost surely, 2^213720860 is an apocalyptic number.

213720860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213720860 is an abundant number, since it is smaller than the sum of its proper divisors (235092988).

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

213720860 is a wasteful number, since it uses less digits than its factorization.

213720860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10686052 (or 10686050 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 213720860 is about 14619.1949162736. The cubic root of 213720860 is about 597.8822189858.

The spelling of 213720860 in words is "two hundred thirteen million, seven hundred twenty thousand, eight hundred sixty".