26642057 has 8 divisors (see below), whose sum is σ = 28763784. Its totient is φ = 24530688.

The previous prime is 26642053. The next prime is 26642059. The reversal of 26642057 is 75024662.

It can be written as a sum of positive squares in 4 ways, for example, as 1048576 + 25593481 = 1024^2 + 5059^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 26642057 - 2² = 26642053 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26642053) 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 7 ways as a sum of consecutive naturals, for example, 3263 + ... + 7995.

It is an arithmetic number, because the mean of its divisors is an integer number (3595473).

Almost surely, 2^26642057 is an apocalyptic number.

It is an amenable number.

26642057 is a deficient number, since it is larger than the sum of its proper divisors (2121727).

26642057 is a wasteful number, since it uses less digits than its factorization.

26642057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5179.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 26642057 is about 5161.5944242065. The cubic root of 26642057 is about 298.6683832533.

The spelling of 26642057 in words is "twenty-six million, six hundred forty-two thousand, fifty-seven".