25798480 has 40 divisors (see below), whose sum is σ = 60208200. Its totient is φ = 10280448.

The previous prime is 25798427. The next prime is 25798511. The reversal of 25798480 is 8489752.

It can be written as a sum of positive squares in 4 ways, for example, as 1236544 + 24561936 = 1112^2 + 4956^2 .

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

It is a congruent number.

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, 30706 + ... + 31534.

It is an arithmetic number, because the mean of its divisors is an integer number (1505205).

Almost surely, 2^25798480 is an apocalyptic number.

25798480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25798480 is an abundant number, since it is smaller than the sum of its proper divisors (34409720).

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

25798480 is a wasteful number, since it uses less digits than its factorization.

25798480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1231 (or 1225 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 43.

The square root of 25798480 is about 5079.2204126224. The cubic root of 25798480 is about 295.4822333887.

It can be divided in two parts, 257984 and 80, that added together give a square (258064 = 508²).

The spelling of 25798480 in words is "twenty-five million, seven hundred ninety-eight thousand, four hundred eighty".