2578788 has 18 divisors (see below), whose sum is σ = 6518694. Its totient is φ = 859584.

The previous prime is 2578787. The next prime is 2578799. The reversal of 2578788 is 8878752.

It is a happy number.

2578788 is a `hidden beast` number, since 2 + 578 + 78 + 8 = 666.

2578788 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1790244 + 788544 = 1338^2 + 888^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (2578787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35781 + ... + 35852.

2^2578788 is an apocalyptic number.

It is an amenable number.

2578788 is an abundant number, since it is smaller than the sum of its proper divisors (3939906).

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

2578788 is a wasteful number, since it uses less digits than its factorization.

2578788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71643 (or 71638 counting only the distinct ones).

The product of its digits is 250880, while the sum is 45.

The square root of 2578788 is about 1605.8605169815. The cubic root of 2578788 is about 137.1319169100.

It can be divided in two parts, 257 and 8788, that added together give a triangular number (9045 = T₁₃₄).

The spelling of 2578788 in words is "two million, five hundred seventy-eight thousand, seven hundred eighty-eight".