26505530 has 16 divisors (see below), whose sum is σ = 48149640. Its totient is φ = 10504512.

The previous prime is 26505529. The next prime is 26505539. The reversal of 26505530 is 3550562.

It can be written as a sum of positive squares in 4 ways, for example, as 24631369 + 1874161 = 4963^2 + 1369^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 26505530.

It is not an unprimeable number, because it can be changed into a prime (26505539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11069 + ... + 13248.

Almost surely, 2^26505530 is an apocalyptic number.

26505530 is a deficient number, since it is larger than the sum of its proper divisors (21644110).

26505530 is a wasteful number, since it uses less digits than its factorization.

26505530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24433.

The product of its (nonzero) digits is 4500, while the sum is 26.

The square root of 26505530 is about 5148.3521635568. The cubic root of 26505530 is about 298.1573347515.

It can be divided in two parts, 26505 and 530, that multiplied together give a triangular number (14047650 = T₅₃₀₀).

The spelling of 26505530 in words is "twenty-six million, five hundred five thousand, five hundred thirty".