25991412 has 24 divisors (see below), whose sum is σ = 61792416. Its totient is φ = 8500128.

The previous prime is 25991401. The next prime is 25991437. The reversal of 25991412 is 21419952.

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, 19798 + ... + 21069.

It is an arithmetic number, because the mean of its divisors is an integer number (2574684).

Almost surely, 2^25991412 is an apocalyptic number.

It is an amenable number.

25991412 is an abundant number, since it is smaller than the sum of its proper divisors (35801004).

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

25991412 is a wasteful number, since it uses less digits than its factorization.

25991412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40927 (or 40925 counting only the distinct ones).

The product of its digits is 6480, while the sum is 33.

The square root of 25991412 is about 5098.1773213571. The cubic root of 25991412 is about 296.2169854074.

The spelling of 25991412 in words is "twenty-five million, nine hundred ninety-one thousand, four hundred twelve".