2578788389 has 16 divisors (see below), whose sum is σ = 2680550400. Its totient is φ = 2479132656.

The previous prime is 2578788383. The next prime is 2578788397. The reversal of 2578788389 is 9838878752.

It is a cyclic number.

It is not a de Polignac number, because 2578788389 - 2⁸ = 2578788133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2578788383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1286462 + ... + 1288464.

It is an arithmetic number, because the mean of its divisors is an integer number (167534400).

Almost surely, 2^2578788389 is an apocalyptic number.

It is an amenable number.

2578788389 is a deficient number, since it is larger than the sum of its proper divisors (101762011).

2578788389 is a wasteful number, since it uses less digits than its factorization.

2578788389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2504.

The product of its digits is 54190080, while the sum is 65.

The square root of 2578788389 is about 50781.7722120841. The cubic root of 2578788389 is about 1371.3192380530.

The spelling of 2578788389 in words is "two billion, five hundred seventy-eight million, seven hundred eighty-eight thousand, three hundred eighty-nine".