2134640 has 20 divisors (see below), whose sum is σ = 4963224. Its totient is φ = 853824.

The previous prime is 2134637. The next prime is 2134697. The reversal of 2134640 is 464312.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13262 + ... + 13421.

2^2134640 is an apocalyptic number.

2134640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2134640 is an abundant number, since it is smaller than the sum of its proper divisors (2828584).

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

2134640 is a wasteful number, since it uses less digits than its factorization.

2134640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26696 (or 26690 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 2134640 is about 1461.0407249629. The cubic root of 2134640 is about 128.7581953498.

Adding to 2134640 its reverse (464312), we get a palindrome (2598952).

The spelling of 2134640 in words is "two million, one hundred thirty-four thousand, six hundred forty".