2071640 has 32 divisors (see below), whose sum is σ = 4736880. Its totient is φ = 815232.

The previous prime is 2071631. The next prime is 2071649. The reversal of 2071640 is 461702.

It is an interprime number because it is at equal distance from previous prime (2071631) and next prime (2071649).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2071649) 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, 2294 + ... + 3066.

2^2071640 is an apocalyptic number.

2071640 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 2071640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2368440).

2071640 is an abundant number, since it is smaller than the sum of its proper divisors (2665240).

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

2071640 is a wasteful number, since it uses less digits than its factorization.

2071640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851 (or 847 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 2071640 is about 1439.3192835504. The cubic root of 2071640 is about 127.4788379590.

The spelling of 2071640 in words is "two million, seventy-one thousand, six hundred forty".