25996840 has 16 divisors (see below), whose sum is σ = 58492980. Its totient is φ = 10398720.

The previous prime is 25996837. The next prime is 25996889. The reversal of 25996840 is 4869952.

It can be written as a sum of positive squares in 2 ways, for example, as 25260676 + 736164 = 5026^2 + 858^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 324921 + ... + 325000.

Almost surely, 2^25996840 is an apocalyptic number.

25996840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25996840 is an abundant number, since it is smaller than the sum of its proper divisors (32496140).

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

25996840 is a wasteful number, since it uses less digits than its factorization.

25996840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649932 (or 649928 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 25996840 is about 5098.7096406836. The cubic root of 25996840 is about 296.2376044473.

The spelling of 25996840 in words is "twenty-five million, nine hundred ninety-six thousand, eight hundred forty".