25128480 has 96 divisors (see below), whose sum is σ = 85264704. Its totient is φ = 6183936.

The previous prime is 25128479. The next prime is 25128487. The reversal of 25128480 is 8482152.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×25128480² = 1262881014220800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (25128487) 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, 4227 + ... + 8253.

It is an arithmetic number, because the mean of its divisors is an integer number (888174).

Almost surely, 2^25128480 is an apocalyptic number.

25128480 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 25128480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42632352).

25128480 is an abundant number, since it is smaller than the sum of its proper divisors (60136224).

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

25128480 is a wasteful number, since it uses less digits than its factorization.

25128480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4058 (or 4050 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 25128480 is about 5012.8315351705. The cubic root of 25128480 is about 292.9018219134.

The spelling of 25128480 in words is "twenty-five million, one hundred twenty-eight thousand, four hundred eighty".