2127640 has 32 divisors (see below), whose sum is σ = 4902480. Its totient is φ = 830592.

The previous prime is 2127617. The next prime is 2127641. The reversal of 2127640 is 467212.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2127641) 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, 1102 + ... + 2338.

2^2127640 is an apocalyptic number.

2127640 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 2127640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2451240).

2127640 is an abundant number, since it is smaller than the sum of its proper divisors (2774840).

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

2127640 is a wasteful number, since it uses less digits than its factorization.

2127640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1291 (or 1287 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 2127640 is about 1458.6432051739. The cubic root of 2127640 is about 128.6172981543.

It can be divided in two parts, 21276 and 40, that added together give a square (21316 = 146²).

The spelling of 2127640 in words is "two million, one hundred twenty-seven thousand, six hundred forty".