25626420 has 36 divisors (see below), whose sum is σ = 77734020. Its totient is φ = 6833664.

The previous prime is 25626379. The next prime is 25626443. The reversal of 25626420 is 2462652.

It can be written as a sum of positive squares in 2 ways, for example, as 13264164 + 12362256 = 3642^2 + 3516^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-3 number, since 3×25626420³ (a number of 23 digits) contains 333 as substring.

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 11 ways as a sum of consecutive naturals, for example, 71005 + ... + 71364.

Almost surely, 2^25626420 is an apocalyptic number.

25626420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25626420 is an abundant number, since it is smaller than the sum of its proper divisors (52107600).

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

25626420 is a wasteful number, since it uses less digits than its factorization.

25626420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142384 (or 142379 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 25626420 is about 5062.2544384888. The cubic root of 25626420 is about 294.8238726497.

The spelling of 25626420 in words is "twenty-five million, six hundred twenty-six thousand, four hundred twenty".