25807572 has 72 divisors (see below), whose sum is σ = 77336896. Its totient is φ = 7371648.

The previous prime is 25807571. The next prime is 25807583. The reversal of 25807572 is 27570852.

25807572 is a `hidden beast` number, since 2 + 5 + 80 + 7 + 572 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25807571) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4908 + ... + 8700.

Almost surely, 2^25807572 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25807572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38668448).

25807572 is an abundant number, since it is smaller than the sum of its proper divisors (51529324).

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

25807572 is a wasteful number, since it uses less digits than its factorization.

25807572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3819 (or 3805 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 36.

The square root of 25807572 is about 5080.1153530210. The cubic root of 25807572 is about 295.5169409752.

The spelling of 25807572 in words is "twenty-five million, eight hundred seven thousand, five hundred seventy-two".