25781480 has 32 divisors (see below), whose sum is σ = 61063200. Its totient is φ = 9769536.

The previous prime is 25781473. The next prime is 25781513. The reversal of 25781480 is 8418752.

It is a super-3 number, since 3×25781480³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25781480.

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, 16202 + ... + 17721.

It is an arithmetic number, because the mean of its divisors is an integer number (1908225).

Almost surely, 2^25781480 is an apocalyptic number.

25781480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25781480 is an abundant number, since it is smaller than the sum of its proper divisors (35281720).

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

25781480 is a wasteful number, since it uses less digits than its factorization.

25781480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33953 (or 33949 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 25781480 is about 5077.5466516813. The cubic root of 25781480 is about 295.4173161052.

The spelling of 25781480 in words is "twenty-five million, seven hundred eighty-one thousand, four hundred eighty".