2078640 has 60 divisors (see below), whose sum is σ = 6983184. Its totient is φ = 554112.

The previous prime is 2078627. The next prime is 2078647. The reversal of 2078640 is 468702.

It is a tau number, because it is divible by the number of its divisors (60).

It is not an unprimeable number, because it can be changed into a prime (2078647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 724 + ... + 2163.

2^2078640 is an apocalyptic number.

2078640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2078640 is an abundant number, since it is smaller than the sum of its proper divisors (4904544).

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

2078640 is a wasteful number, since it uses less digits than its factorization.

2078640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2906 (or 2897 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 2078640 is about 1441.7489379223. The cubic root of 2078640 is about 127.6222587388.

The spelling of 2078640 in words is "two million, seventy-eight thousand, six hundred forty".