2561608 has 32 divisors (see below), whose sum is σ = 5544000. Its totient is φ = 1086912.

The previous prime is 2561593. The next prime is 2561627. The reversal of 2561608 is 8061652.

It is a Harshad number since it is a multiple of its sum of digits (28).

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, 8191 + ... + 8497.

It is an arithmetic number, because the mean of its divisors is an integer number (173250).

2^2561608 is an apocalyptic number.

2561608 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2561608 is an abundant number, since it is smaller than the sum of its proper divisors (2982392).

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

2561608 is a wasteful number, since it uses less digits than its factorization.

2561608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469 (or 465 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 2561608 is about 1600.5024211166. The cubic root of 2561608 is about 136.8267118364.

The spelling of 2561608 in words is "two million, five hundred sixty-one thousand, six hundred eight".