25696340 has 24 divisors (see below), whose sum is σ = 55280232. Its totient is φ = 10027520.

The previous prime is 25696331. The next prime is 25696351. The reversal of 25696340 is 4369652.

It can be written as a sum of positive squares in 4 ways, for example, as 2617924 + 23078416 = 1618^2 + 4804^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 25696340.

It is a congruent number.

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, 14849 + ... + 16488.

It is an arithmetic number, because the mean of its divisors is an integer number (2303343).

Almost surely, 2^25696340 is an apocalyptic number.

25696340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25696340 is an abundant number, since it is smaller than the sum of its proper divisors (29583892).

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

25696340 is a wasteful number, since it uses less digits than its factorization.

25696340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31387 (or 31385 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 25696340 is about 5069.1557482484. The cubic root of 25696340 is about 295.0917649978.

The spelling of 25696340 in words is "twenty-five million, six hundred ninety-six thousand, three hundred forty".