25905380 has 24 divisors (see below), whose sum is σ = 54515832. Its totient is φ = 10340352.

The previous prime is 25905377. The next prime is 25905391. The reversal of 25905380 is 8350952.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4301476 + 21603904 = 2074^2 + 4648^2 .

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, 11204 + ... + 13316.

It is an arithmetic number, because the mean of its divisors is an integer number (2271493).

Almost surely, 2^25905380 is an apocalyptic number.

25905380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25905380 is an abundant number, since it is smaller than the sum of its proper divisors (28610452).

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

25905380 is a wasteful number, since it uses less digits than its factorization.

25905380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2735 (or 2733 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 25905380 is about 5089.7328024170. The cubic root of 25905380 is about 295.8897964479.

The spelling of 25905380 in words is "twenty-five million, nine hundred five thousand, three hundred eighty".