25430660 has 24 divisors (see below), whose sum is σ = 54708696. Its totient is φ = 9923840.

The previous prime is 25430659. The next prime is 25430677. The reversal of 25430660 is 6603452.

It can be written as a sum of positive squares in 4 ways, for example, as 2715904 + 22714756 = 1648^2 + 4766^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14687 + ... + 16326.

It is an arithmetic number, because the mean of its divisors is an integer number (2279529).

Almost surely, 2^25430660 is an apocalyptic number.

25430660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25430660 is an abundant number, since it is smaller than the sum of its proper divisors (29278036).

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

25430660 is a wasteful number, since it uses less digits than its factorization.

25430660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31063 (or 31061 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 25430660 is about 5042.8821124432. The cubic root of 25430660 is about 294.0712339154.

The spelling of 25430660 in words is "twenty-five million, four hundred thirty thousand, six hundred sixty".