25003280 has 40 divisors (see below), whose sum is σ = 59239512. Its totient is φ = 9810944.

The previous prime is 25003247. The next prime is 25003301. The reversal of 25003280 is 8230052.

It can be written as a sum of positive squares in 4 ways, for example, as 10010896 + 14992384 = 3164^2 + 3872^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

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 7 ways as a sum of consecutive naturals, for example, 1292 + ... + 7188.

Almost surely, 2^25003280 is an apocalyptic number.

25003280 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 25003280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29619756).

25003280 is an abundant number, since it is smaller than the sum of its proper divisors (34236232).

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

25003280 is a wasteful number, since it uses less digits than its factorization.

25003280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5963 (or 5957 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 25003280 is about 5000.3279892423. The cubic root of 25003280 is about 292.4145609663.

The spelling of 25003280 in words is "twenty-five million, three thousand, two hundred eighty".