25681396 has 12 divisors (see below), whose sum is σ = 48399652. Its totient is φ = 11852928.

The previous prime is 25681393. The next prime is 25681451. The reversal of 25681396 is 69318652.

It can be written as a sum of positive squares in 2 ways, for example, as 12460900 + 13220496 = 3530^2 + 3636^2 .

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25681393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 246885 + ... + 246988.

Almost surely, 2^25681396 is an apocalyptic number.

25681396 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

25681396 is a deficient number, since it is larger than the sum of its proper divisors (22718256).

25681396 is a wasteful number, since it uses less digits than its factorization.

25681396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493890 (or 493888 counting only the distinct ones).

The product of its digits is 77760, while the sum is 40.

The square root of 25681396 is about 5067.6815211692. The cubic root of 25681396 is about 295.0345492429.

The spelling of 25681396 in words is "twenty-five million, six hundred eighty-one thousand, three hundred ninety-six".