25760578 has 4 divisors (see below), whose sum is σ = 38640870. Its totient is φ = 12880288.

The previous prime is 25760549. The next prime is 25760591. The reversal of 25760578 is 87506752.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 25472209 + 288369 = 5047^2 + 537^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 25760578.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6440143 + ... + 6440146.

Almost surely, 2^25760578 is an apocalyptic number.

25760578 is a deficient number, since it is larger than the sum of its proper divisors (12880292).

25760578 is a wasteful number, since it uses less digits than its factorization.

25760578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12880291.

The product of its (nonzero) digits is 117600, while the sum is 40.

The square root of 25760578 is about 5075.4879568373. The cubic root of 25760578 is about 295.3374592698.

The spelling of 25760578 in words is "twenty-five million, seven hundred sixty thousand, five hundred seventy-eight".