25682978 has 4 divisors (see below), whose sum is σ = 38524470. Its totient is φ = 12841488.

The previous prime is 25682963. The next prime is 25682983. The reversal of 25682978 is 87928652.

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., 13271449 + 12411529 = 3643^2 + 3523^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 6420743 + ... + 6420746.

Almost surely, 2^25682978 is an apocalyptic number.

25682978 is a deficient number, since it is larger than the sum of its proper divisors (12841492).

25682978 is a wasteful number, since it uses less digits than its factorization.

25682978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12841491.

The product of its digits is 483840, while the sum is 47.

The square root of 25682978 is about 5067.8376059223. The cubic root of 25682978 is about 295.0406072608.

The spelling of 25682978 in words is "twenty-five million, six hundred eighty-two thousand, nine hundred seventy-eight".