26469640 has 16 divisors (see below), whose sum is σ = 59556780. Its totient is φ = 10587840.

The previous prime is 26469617. The next prime is 26469647. The reversal of 26469640 is 4696462.

It can be written as a sum of positive squares in 2 ways, for example, as 24581764 + 1887876 = 4958^2 + 1374^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 26469640.

It is not an unprimeable number, because it can be changed into a prime (26469647) 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 3 ways as a sum of consecutive naturals, for example, 330831 + ... + 330910.

Almost surely, 2^26469640 is an apocalyptic number.

26469640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26469640 is an abundant number, since it is smaller than the sum of its proper divisors (33087140).

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

26469640 is a wasteful number, since it uses less digits than its factorization.

26469640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661752 (or 661748 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 26469640 is about 5144.8654015436. The cubic root of 26469640 is about 298.0226999509.

The spelling of 26469640 in words is "twenty-six million, four hundred sixty-nine thousand, six hundred forty".