25978156 has 6 divisors (see below), whose sum is σ = 45461780. Its totient is φ = 12989076.

The previous prime is 25978153. The next prime is 25978157. The reversal of 25978156 is 65187952.

It is not an unprimeable number, because it can be changed into a prime (25978153) by changing a digit.

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, 3247266 + ... + 3247273.

Almost surely, 2^25978156 is an apocalyptic number.

It is an amenable number.

25978156 is a deficient number, since it is larger than the sum of its proper divisors (19483624).

25978156 is a wasteful number, since it uses less digits than its factorization.

25978156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6494543 (or 6494541 counting only the distinct ones).

The product of its digits is 151200, while the sum is 43.

The square root of 25978156 is about 5096.8770830774. The cubic root of 25978156 is about 296.1666185132.

The spelling of 25978156 in words is "twenty-five million, nine hundred seventy-eight thousand, one hundred fifty-six".