25978570 has 8 divisors (see below), whose sum is σ = 46761444. Its totient is φ = 10391424.

The previous prime is 25978553. The next prime is 25978571. The reversal of 25978570 is 7587952.

It can be written as a sum of positive squares in 2 ways, for example, as 25796241 + 182329 = 5079^2 + 427^2 .

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 (25978571) 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, 1298919 + ... + 1298938.

Almost surely, 2^25978570 is an apocalyptic number.

25978570 is a deficient number, since it is larger than the sum of its proper divisors (20782874).

25978570 is a wasteful number, since it uses less digits than its factorization.

25978570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2597864.

The product of its (nonzero) digits is 176400, while the sum is 43.

The square root of 25978570 is about 5096.9176960198. The cubic root of 25978570 is about 296.1681917879.

The spelling of 25978570 in words is "twenty-five million, nine hundred seventy-eight thousand, five hundred seventy".