25505628 has 12 divisors (see below), whose sum is σ = 59513160. Its totient is φ = 8501872.

The previous prime is 25505611. The next prime is 25505629. The reversal of 25505628 is 82650552.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25505629) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1062723 + ... + 1062746.

It is an arithmetic number, because the mean of its divisors is an integer number (4959430).

Almost surely, 2^25505628 is an apocalyptic number.

It is an amenable number.

25505628 is an abundant number, since it is smaller than the sum of its proper divisors (34007532).

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

25505628 is a wasteful number, since it uses less digits than its factorization.

25505628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2125476 (or 2125474 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 33.

The square root of 25505628 is about 5050.3096934743. The cubic root of 25505628 is about 294.3599183135.

The spelling of 25505628 in words is "twenty-five million, five hundred five thousand, six hundred twenty-eight".