2665920 has 56 divisors (see below), whose sum is σ = 8467344. Its totient is φ = 710656.

The previous prime is 2665913. The next prime is 2665931. The reversal of 2665920 is 295662.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 429 + ... + 2348.

2^2665920 is an apocalyptic number.

2665920 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 2665920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4233672).

2665920 is an abundant number, since it is smaller than the sum of its proper divisors (5801424).

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

2665920 is a wasteful number, since it uses less digits than its factorization.

2665920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2797 (or 2787 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 2665920 is about 1632.7645268072. The cubic root of 2665920 is about 138.6593109182.

The spelling of 2665920 in words is "two million, six hundred sixty-five thousand, nine hundred twenty".