2555890 has 8 divisors (see below), whose sum is σ = 4600620. Its totient is φ = 1022352.

The previous prime is 2555881. The next prime is 2555893. The reversal of 2555890 is 985552.

It can be written as a sum of positive squares in 2 ways, for example, as 2187441 + 368449 = 1479^2 + 607^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (2555893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127785 + ... + 127804.

2^2555890 is an apocalyptic number.

2555890 is a deficient number, since it is larger than the sum of its proper divisors (2044730).

2555890 is a wasteful number, since it uses less digits than its factorization.

2555890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255596.

The product of its (nonzero) digits is 18000, while the sum is 34.

The square root of 2555890 is about 1598.7151090798. The cubic root of 2555890 is about 136.7248281760.

The spelling of 2555890 in words is "two million, five hundred fifty-five thousand, eight hundred ninety".