26430660 has 36 divisors (see below), whose sum is σ = 80173548. Its totient is φ = 7048128.

The previous prime is 26430637. The next prime is 26430661. The reversal of 26430660 is 6603462.

It can be written as a sum of positive squares in 2 ways, for example, as 12278016 + 14152644 = 3504^2 + 3762^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (26430661) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 73239 + ... + 73598.

It is an arithmetic number, because the mean of its divisors is an integer number (2227043).

Almost surely, 2^26430660 is an apocalyptic number.

26430660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26430660 is an abundant number, since it is smaller than the sum of its proper divisors (53742888).

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

26430660 is a wasteful number, since it uses less digits than its factorization.

26430660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146852 (or 146847 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 26430660 is about 5141.0757629119. The cubic root of 26430660 is about 297.8763356383.

The spelling of 26430660 in words is "twenty-six million, four hundred thirty thousand, six hundred sixty".