26440164 has 27 divisors (see below), whose sum is σ = 66912937. Its totient is φ = 8803104.

The previous prime is 26440159. The next prime is 26440171. The reversal of 26440164 is 46104462.

The square root of 26440164 is 5142.

It is a perfect power (a square), and thus also a powerful number.

26440164 is a `hidden beast` number, since 2 + 644 + 0 + 16 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 24502500 + 1937664 = 4950^2 + 1392^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 30424 + ... + 31280.

Almost surely, 2^26440164 is an apocalyptic number.

26440164 is the 5142-nd square number.

It is an amenable number.

26440164 is an abundant number, since it is smaller than the sum of its proper divisors (40472773).

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

26440164 is an equidigital number, since it uses as much as digits as its factorization.

26440164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1724 (or 862 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The cubic root of 26440164 is about 297.9120350549.

The spelling of 26440164 in words is "twenty-six million, four hundred forty thousand, one hundred sixty-four".