25597680 has 40 divisors (see below), whose sum is σ = 79353552. Its totient is φ = 6825984.

The previous prime is 25597667. The next prime is 25597687. The reversal of 25597680 is 8679552.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25597687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53089 + ... + 53568.

Almost surely, 2^25597680 is an apocalyptic number.

25597680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25597680 is an abundant number, since it is smaller than the sum of its proper divisors (53755872).

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

25597680 is a wasteful number, since it uses less digits than its factorization.

25597680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106673 (or 106667 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 42.

The square root of 25597680 is about 5059.4149859445. The cubic root of 25597680 is about 294.7136165461.

The spelling of 25597680 in words is "twenty-five million, five hundred ninety-seven thousand, six hundred eighty".