25971778 has 16 divisors (see below), whose sum is σ = 45609984. Its totient is φ = 10859040.

The previous prime is 25971763. The next prime is 25971793. The reversal of 25971778 is 87717952.

It is an interprime number because it is at equal distance from previous prime (25971763) and next prime (25971793).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22050 + ... + 23197.

It is an arithmetic number, because the mean of its divisors is an integer number (2850624).

Almost surely, 2^25971778 is an apocalyptic number.

25971778 is a deficient number, since it is larger than the sum of its proper divisors (19638206).

25971778 is a wasteful number, since it uses less digits than its factorization.

25971778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45297.

The product of its digits is 246960, while the sum is 46.

The square root of 25971778 is about 5096.2513674268. The cubic root of 25971778 is about 296.1423788494.

The spelling of 25971778 in words is "twenty-five million, nine hundred seventy-one thousand, seven hundred seventy-eight".