2658240 has 168 divisors, whose sum is σ = 9985248. Its totient is φ = 645120.

The previous prime is 2658221. The next prime is 2658247. The reversal of 2658240 is 428562.

2658240 is a `hidden beast` number, since 2 + 658 + 2 + 4 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2658247) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37405 + ... + 37475.

It is an arithmetic number, because the mean of its divisors is an integer number (59436).

2^2658240 is an apocalyptic number.

2658240 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 2658240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4992624).

2658240 is an abundant number, since it is smaller than the sum of its proper divisors (7327008).

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

2658240 is a wasteful number, since it uses less digits than its factorization.

2658240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107 (or 94 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 2658240 is about 1630.4109911308. The cubic root of 2658240 is about 138.5260326326.

The spelling of 2658240 in words is "two million, six hundred fifty-eight thousand, two hundred forty".