26657642 has 16 divisors (see below), whose sum is σ = 43848000. Its totient is φ = 12054240.

The previous prime is 26657639. The next prime is 26657647. The reversal of 26657642 is 24675662.

It is a junction number, because it is equal to n+sod(n) for n = 26657596 and 26657605.

It is not an unprimeable number, because it can be changed into a prime (26657647) 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 7 ways as a sum of consecutive naturals, for example, 1334 + ... + 7422.

It is an arithmetic number, because the mean of its divisors is an integer number (2740500).

Almost surely, 2^26657642 is an apocalyptic number.

26657642 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

26657642 is a deficient number, since it is larger than the sum of its proper divisors (17190358).

26657642 is a wasteful number, since it uses less digits than its factorization.

26657642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6301.

The product of its digits is 120960, while the sum is 38.

The square root of 26657642 is about 5163.1039114083. The cubic root of 26657642 is about 298.7266099811.

The spelling of 26657642 in words is "twenty-six million, six hundred fifty-seven thousand, six hundred forty-two".