25385670 has 64 divisors (see below), whose sum is σ = 68221440. Its totient is φ = 6717024.

The previous prime is 25385669. The next prime is 25385671. The reversal of 25385670 is 7658352.

25385670 is a `hidden beast` number, since 2 + 538 + 56 + 70 = 666.

It is an interprime number because it is at equal distance from previous prime (25385669) and next prime (25385671).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25385671) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44809 + ... + 45371.

It is an arithmetic number, because the mean of its divisors is an integer number (1065960).

Almost surely, 2^25385670 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25385670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34110720).

25385670 is an abundant number, since it is smaller than the sum of its proper divisors (42835770).

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

25385670 is a wasteful number, since it uses less digits than its factorization.

25385670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746 (or 740 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 25385670 is about 5038.4193950087. The cubic root of 25385670 is about 293.8977153557.

The spelling of 25385670 in words is "twenty-five million, three hundred eighty-five thousand, six hundred seventy".