2605890 has 32 divisors (see below), whose sum is σ = 7148160. Its totient is φ = 595584.

The previous prime is 2605871. The next prime is 2605909. The reversal of 2605890 is 985062.

It is an interprime number because it is at equal distance from previous prime (2605871) and next prime (2605909).

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5995 + ... + 6414.

It is an arithmetic number, because the mean of its divisors is an integer number (223380).

2^2605890 is an apocalyptic number.

2605890 is an abundant number, since it is smaller than the sum of its proper divisors (4542270).

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

2605890 is a wasteful number, since it uses less digits than its factorization.

2605890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12426.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 2605890 is about 1614.2769279154. The cubic root of 2605890 is about 137.6106437255.

The spelling of 2605890 in words is "two million, six hundred five thousand, eight hundred ninety".