2139680 has 48 divisors (see below), whose sum is σ = 5189184. Its totient is φ = 833280.

The previous prime is 2139677. The next prime is 2139691. The reversal of 2139680 is 869312.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6725 + ... + 7035.

It is an arithmetic number, because the mean of its divisors is an integer number (108108).

2^2139680 is an apocalyptic number.

2139680 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 2139680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2594592).

2139680 is an abundant number, since it is smaller than the sum of its proper divisors (3049504).

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

2139680 is a wasteful number, since it uses less digits than its factorization.

2139680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369 (or 361 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 2139680 is about 1462.7645059954. The cubic root of 2139680 is about 128.8594507129.

The spelling of 2139680 in words is "two million, one hundred thirty-nine thousand, six hundred eighty".