25870478 has 4 divisors (see below), whose sum is σ = 38805720. Its totient is φ = 12935238.

The previous prime is 25870463. The next prime is 25870487. The reversal of 25870478 is 87407852.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6467618 + ... + 6467621.

It is an arithmetic number, because the mean of its divisors is an integer number (9701430).

Almost surely, 2^25870478 is an apocalyptic number.

25870478 is a deficient number, since it is larger than the sum of its proper divisors (12935242).

25870478 is a wasteful number, since it uses less digits than its factorization.

25870478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12935241.

The product of its (nonzero) digits is 125440, while the sum is 41.

The square root of 25870478 is about 5086.3029795717. The cubic root of 25870478 is about 295.7568538310.

The spelling of 25870478 in words is "twenty-five million, eight hundred seventy thousand, four hundred seventy-eight".