25668340 has 12 divisors (see below), whose sum is σ = 53903556. Its totient is φ = 10267328.

The previous prime is 25668329. The next prime is 25668353. The reversal of 25668340 is 4386652.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12096484 + 13571856 = 3478^2 + 3684^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25668296 and 25668305.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 641689 + ... + 641728.

It is an arithmetic number, because the mean of its divisors is an integer number (4491963).

Almost surely, 2^25668340 is an apocalyptic number.

25668340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25668340 is an abundant number, since it is smaller than the sum of its proper divisors (28235216).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25668340 is a wasteful number, since it uses less digits than its factorization.

25668340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1283426 (or 1283424 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 25668340 is about 5066.3931943741. The cubic root of 25668340 is about 294.9845438613.

The spelling of 25668340 in words is "twenty-five million, six hundred sixty-eight thousand, three hundred forty".