26428905 has 24 divisors (see below), whose sum is σ = 48222720. Its totient is φ = 13353120.

The previous prime is 26428891. The next prime is 26428907. The reversal of 26428905 is 50982462.

It is a happy number.

26428905 is a `hidden beast` number, since 2 + 642 + 8 + 9 + 0 + 5 = 666.

It is not a de Polignac number, because 26428905 - 2⁹ = 26428393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26428905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26428907) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 14601 + ... + 16310.

It is an arithmetic number, because the mean of its divisors is an integer number (2009280).

Almost surely, 2^26428905 is an apocalyptic number.

It is an amenable number.

26428905 is a deficient number, since it is larger than the sum of its proper divisors (21793815).

26428905 is a wasteful number, since it uses less digits than its factorization.

26428905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30941 (or 30938 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 26428905 is about 5140.9050759570. The cubic root of 26428905 is about 297.8697424804.

The spelling of 26428905 in words is "twenty-six million, four hundred twenty-eight thousand, nine hundred five".