25780650 has 96 divisors (see below), whose sum is σ = 74899968. Its totient is φ = 5745600.

The previous prime is 25780639. The next prime is 25780661. The reversal of 25780650 is 5608752.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (25780639) and next prime (25780661).

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 47 ways as a sum of consecutive naturals, for example, 44865 + ... + 45435.

It is an arithmetic number, because the mean of its divisors is an integer number (780208).

Almost surely, 2^25780650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25780650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37449984).

25780650 is an abundant number, since it is smaller than the sum of its proper divisors (49119318).

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

25780650 is a wasteful number, since it uses less digits than its factorization.

25780650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636 (or 631 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 25780650 is about 5077.4649186380. The cubic root of 25780650 is about 295.4141458837.

The spelling of 25780650 in words is "twenty-five million, seven hundred eighty thousand, six hundred fifty".