25778193 has 48 divisors (see below), whose sum is σ = 43975680. Its totient is φ = 13096512.

The previous prime is 25778191. The next prime is 25778197. The reversal of 25778193 is 39187752.

It is not a de Polignac number, because 25778193 - 2¹ = 25778191 is a prime.

Its product of digits (105840) is a multiple of the sum of its prime divisors (105).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25778191) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 486355 + ... + 486407.

It is an arithmetic number, because the mean of its divisors is an integer number (916160).

Almost surely, 2^25778193 is an apocalyptic number.

25778193 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

25778193 is a deficient number, since it is larger than the sum of its proper divisors (18197487).

25778193 is a wasteful number, since it uses less digits than its factorization.

25778193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158 (or 105 counting only the distinct ones).

The product of its digits is 105840, while the sum is 42.

The square root of 25778193 is about 5077.2229614229. Note that the first 3 decimals coincide. The cubic root of 25778193 is about 295.4047608654.

The spelling of 25778193 in words is "twenty-five million, seven hundred seventy-eight thousand, one hundred ninety-three".