25613406 has 96 divisors (see below), whose sum is σ = 71984640. Its totient is φ = 6391872.

The previous prime is 25613381. The next prime is 25613411. The reversal of 25613406 is 60431652.

25613406 is a `hidden beast` number, since 2 + 5 + 613 + 40 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 25613406.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 30711 + ... + 31533.

It is an arithmetic number, because the mean of its divisors is an integer number (749840).

Almost surely, 2^25613406 is an apocalyptic number.

25613406 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 25613406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35992320).

25613406 is an abundant number, since it is smaller than the sum of its proper divisors (46371234).

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

25613406 is a wasteful number, since it uses less digits than its factorization.

25613406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870 (or 867 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 25613406 is about 5060.9688795724. The cubic root of 25613406 is about 294.7739568784.

The spelling of 25613406 in words is "twenty-five million, six hundred thirteen thousand, four hundred six".