2139320 has 32 divisors (see below), whose sum is σ = 4881600. Its totient is φ = 843648.

The previous prime is 2139311. The next prime is 2139323. The reversal of 2139320 is 239312.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 2139292 and 2139301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2139323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2822 + ... + 3498.

It is an arithmetic number, because the mean of its divisors is an integer number (152550).

2^2139320 is an apocalyptic number.

2139320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2139320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2440800).

2139320 is an abundant number, since it is smaller than the sum of its proper divisors (2742280).

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

2139320 is a wasteful number, since it uses less digits than its factorization.

2139320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767 (or 763 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 2139320 is about 1462.6414461514. The cubic root of 2139320 is about 128.8522234633.

The spelling of 2139320 in words is "two million, one hundred thirty-nine thousand, three hundred twenty".