2620660 has 24 divisors (see below), whose sum is σ = 6289920. Its totient is φ = 898464.

The previous prime is 2620637. The next prime is 2620661. The reversal of 2620660 is 660262.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2620661) 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, 9220 + ... + 9499.

It is an arithmetic number, because the mean of its divisors is an integer number (262080).

2^2620660 is an apocalyptic number.

2620660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2620660 is an abundant number, since it is smaller than the sum of its proper divisors (3669260).

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

2620660 is a wasteful number, since it uses less digits than its factorization.

2620660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18735 (or 18733 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 2620660 is about 1618.8452674669. The cubic root of 2620660 is about 137.8701431946.

The spelling of 2620660 in words is "two million, six hundred twenty thousand, six hundred sixty".