2139392 has 36 divisors (see below), whose sum is σ = 4372116. Its totient is φ = 1044480.

The previous prime is 2139383. The next prime is 2139407. The reversal of 2139392 is 2939312.

It can be written as a sum of positive squares in 2 ways, for example, as 541696 + 1597696 = 736^2 + 1264^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15548 + ... + 15684.

2^2139392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2139392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2186058).

2139392 is an abundant number, since it is smaller than the sum of its proper divisors (2232724).

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

2139392 is an equidigital number, since it uses as much as digits as its factorization.

2139392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214 (or 200 counting only the distinct ones).

The product of its digits is 2916, while the sum is 29.

The square root of 2139392 is about 1462.6660589485. Note that the first 3 decimals coincide. The cubic root of 2139392 is about 128.8536689781.

It can be divided in two parts, 2 and 139392, that multiplied together give a square (278784 = 528²).

The spelling of 2139392 in words is "two million, one hundred thirty-nine thousand, three hundred ninety-two".