25717880 has 16 divisors (see below), whose sum is σ = 57865320. Its totient is φ = 10287136.

The previous prime is 25717877. The next prime is 25717903. The reversal of 25717880 is 8871752.

It is a super-2 number, since 2×25717880² = 1322818703388800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321434 + ... + 321513.

Almost surely, 2^25717880 is an apocalyptic number.

25717880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25717880 is an abundant number, since it is smaller than the sum of its proper divisors (32147440).

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

25717880 is a wasteful number, since it uses less digits than its factorization.

25717880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642958 (or 642954 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 38.

The square root of 25717880 is about 5071.2799173384. The cubic root of 25717880 is about 295.1741956915.

The spelling of 25717880 in words is "twenty-five million, seven hundred seventeen thousand, eight hundred eighty".