25864650 has 288 divisors, whose sum is σ = 91601280. Its totient is φ = 5322240.

The previous prime is 25864649. The next prime is 25864687. The reversal of 25864650 is 5646852.

25864650 is a `hidden beast` number, since 2 + 5 + 8 + 646 + 5 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1124539 + ... + 1124561.

It is an arithmetic number, because the mean of its divisors is an integer number (318060).

Almost surely, 2^25864650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25864650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45800640).

25864650 is an abundant number, since it is smaller than the sum of its proper divisors (65736630).

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

25864650 is a wasteful number, since it uses less digits than its factorization.

25864650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75 (or 57 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 25864650 is about 5085.7300360912. The cubic root of 25864650 is about 295.7346431810.

The spelling of 25864650 in words is "twenty-five million, eight hundred sixty-four thousand, six hundred fifty".