25705480 has 64 divisors (see below), whose sum is σ = 61560000. Its totient is φ = 9633024.

The previous prime is 25705469. The next prime is 25705481. The reversal of 25705480 is 8450752.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25705481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113127 + ... + 113353.

It is an arithmetic number, because the mean of its divisors is an integer number (961875).

Almost surely, 2^25705480 is an apocalyptic number.

25705480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25705480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30780000).

25705480 is an abundant number, since it is smaller than the sum of its proper divisors (35854520).

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

25705480 is a wasteful number, since it uses less digits than its factorization.

25705480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406 (or 402 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 31.

The square root of 25705480 is about 5070.0571988884. The cubic root of 25705480 is about 295.1267481772.

The spelling of 25705480 in words is "twenty-five million, seven hundred five thousand, four hundred eighty".