25678620 has 180 divisors, whose sum is σ = 89219592. Its totient is φ = 6177600.

The previous prime is 25678589. The next prime is 25678637. The reversal of 25678620 is 2687652.

25678620 is a `hidden beast` number, since 25 + 6 + 7 + 8 + 620 = 666.

It is a tau number, because it is divible by the number of its divisors (180).

It is a Harshad number since it is a multiple of its sum of digits (36).

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 59 ways as a sum of consecutive naturals, for example, 195955 + ... + 196085.

Almost surely, 2^25678620 is an apocalyptic number.

25678620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25678620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44609796).

25678620 is an abundant number, since it is smaller than the sum of its proper divisors (63540972).

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

25678620 is a wasteful number, since it uses less digits than its factorization.

25678620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174 (or 152 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 25678620 is about 5067.4076212596. The cubic root of 25678620 is about 295.0239183901.

The spelling of 25678620 in words is "twenty-five million, six hundred seventy-eight thousand, six hundred twenty".