2559988 has 6 divisors (see below), whose sum is σ = 4479986. Its totient is φ = 1279992.

The previous prime is 2559983. The next prime is 2559989. The reversal of 2559988 is 8899552.

It can be written as a sum of positive squares in only one way, i.e., 2471184 + 88804 = 1572^2 + 298^2 .

It is a d-powerful number, because it can be written as 2¹⁶ + 5² + 5⁸ + 9² + 9⁴ + 8 + 8⁷ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2559983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 319995 + ... + 320002.

2^2559988 is an apocalyptic number.

It is an amenable number.

2559988 is a deficient number, since it is larger than the sum of its proper divisors (1919998).

2559988 is a wasteful number, since it uses less digits than its factorization.

2559988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640001 (or 639999 counting only the distinct ones).

The product of its digits is 259200, while the sum is 46.

The square root of 2559988 is about 1599.9962499956. The cubic root of 2559988 is about 136.7978619868.

The spelling of 2559988 in words is "two million, five hundred fifty-nine thousand, nine hundred eighty-eight".