2028565 has 24 divisors (see below), whose sum is σ = 3064320. Its totient is φ = 1261920.

The previous prime is 2028527. The next prime is 2028581. The reversal of 2028565 is 5658202.

2028565 = T₄₂₉ + T₄₃₀ + ... + T₄₄₉.

It is not a de Polignac number, because 2028565 - 2⁹ = 2028053 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3996 + ... + 4474.

It is an arithmetic number, because the mean of its divisors is an integer number (127680).

2^2028565 is an apocalyptic number.

It is an amenable number.

2028565 is a deficient number, since it is larger than the sum of its proper divisors (1035755).

2028565 is a wasteful number, since it uses less digits than its factorization.

2028565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513 (or 502 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 2028565 is about 1424.2770095736. The cubic root of 2028565 is about 126.5890991698.

The spelling of 2028565 in words is "two million, twenty-eight thousand, five hundred sixty-five".