25557480 has 192 divisors, whose sum is σ = 92252160. Its totient is φ = 6096384.

The previous prime is 25557479. The next prime is 25557517. The reversal of 25557480 is 8475552.

It is a happy number.

25557480 is a `hidden beast` number, since 2 + 5 + 5 + 574 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 201177 + ... + 201303.

It is an arithmetic number, because the mean of its divisors is an integer number (480480).

Almost surely, 2^25557480 is an apocalyptic number.

25557480 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 25557480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46126080).

25557480 is an abundant number, since it is smaller than the sum of its proper divisors (66694680).

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

25557480 is a wasteful number, since it uses less digits than its factorization.

25557480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200 (or 193 counting only the distinct ones).

The product of its (nonzero) digits is 56000, while the sum is 36.

The square root of 25557480 is about 5055.4406336144. The cubic root of 25557480 is about 294.5592575732.

The spelling of 25557480 in words is "twenty-five million, five hundred fifty-seven thousand, four hundred eighty".