2668720 has 20 divisors (see below), whose sum is σ = 6204960. Its totient is φ = 1067456.

The previous prime is 2668693. The next prime is 2668727. The reversal of 2668720 is 278662.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (2668727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16600 + ... + 16759.

It is an arithmetic number, because the mean of its divisors is an integer number (310248).

2^2668720 is an apocalyptic number.

2668720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2668720 is an abundant number, since it is smaller than the sum of its proper divisors (3536240).

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

2668720 is a wasteful number, since it uses less digits than its factorization.

2668720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33372 (or 33366 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 2668720 is about 1633.6217432441. The cubic root of 2668720 is about 138.7078382840.

The spelling of 2668720 in words is "two million, six hundred sixty-eight thousand, seven hundred twenty".