26691049 has 16 divisors (see below), whose sum is σ = 34427520. Its totient is φ = 20079360.

The previous prime is 26691047. The next prime is 26691059. The reversal of 26691049 is 94019662.

It is not a de Polignac number, because 26691049 - 2¹ = 26691047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 26690999 and 26691017.

It is not an unprimeable number, because it can be changed into a prime (26691047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3744 + ... + 8209.

It is an arithmetic number, because the mean of its divisors is an integer number (2151720).

Almost surely, 2^26691049 is an apocalyptic number.

26691049 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

26691049 is a deficient number, since it is larger than the sum of its proper divisors (7736471).

26691049 is a wasteful number, since it uses less digits than its factorization.

26691049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12000.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 26691049 is about 5166.3380648192. The cubic root of 26691049 is about 298.8513446196.

The spelling of 26691049 in words is "twenty-six million, six hundred ninety-one thousand, forty-nine".