25709712 has 120 divisors (see below), whose sum is σ = 81932256. Its totient is φ = 6902784.

The previous prime is 25709711. The next prime is 25709741. The reversal of 25709712 is 21790752.

It is a super-2 number, since 2×25709712² = 1321978582245888, which contains 22 as substring.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (25709711) 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, 39663 + ... + 40305.

Almost surely, 2^25709712 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 25709712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40966128).

25709712 is an abundant number, since it is smaller than the sum of its proper divisors (56222544).

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

25709712 is a wasteful number, since it uses less digits than its factorization.

25709712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685 (or 672 counting only the distinct ones).

The product of its (nonzero) digits is 8820, while the sum is 33.

The square root of 25709712 is about 5070.4745340057. The cubic root of 25709712 is about 295.1429432694.

The spelling of 25709712 in words is "twenty-five million, seven hundred nine thousand, seven hundred twelve".