25618880 has 56 divisors (see below), whose sum is σ = 69726048. Its totient is φ = 8782848.

The previous prime is 25618871. The next prime is 25618889. The reversal of 25618880 is 8881652.

It is an interprime number because it is at equal distance from previous prime (25618871) and next prime (25618889).

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-3 number, since 3×25618880³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25618889) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3479 + ... + 7958.

It is an arithmetic number, because the mean of its divisors is an integer number (1245108).

Almost surely, 2^25618880 is an apocalyptic number.

25618880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25618880 is an abundant number, since it is smaller than the sum of its proper divisors (44107168).

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

25618880 is a wasteful number, since it uses less digits than its factorization.

25618880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11461 (or 11451 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 38.

The square root of 25618880 is about 5061.5096562192. The cubic root of 25618880 is about 294.7949547067.

The spelling of 25618880 in words is "twenty-five million, six hundred eighteen thousand, eight hundred eighty".