2138670 has 48 divisors (see below), whose sum is σ = 5767920. Its totient is φ = 563904.

The previous prime is 2138657. The next prime is 2138671. The reversal of 2138670 is 768312.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2138671) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23986 + ... + 24074.

It is an arithmetic number, because the mean of its divisors is an integer number (120165).

2^2138670 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2138670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2883960).

2138670 is an abundant number, since it is smaller than the sum of its proper divisors (3629250).

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

2138670 is an equidigital number, since it uses as much as digits as its factorization.

2138670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194 (or 99 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 2138670 is about 1462.4192285388. The cubic root of 2138670 is about 128.8391722088.

The spelling of 2138670 in words is "two million, one hundred thirty-eight thousand, six hundred seventy".