26621091 has 12 divisors (see below), whose sum is σ = 43946032. Its totient is φ = 15212016.

The previous prime is 26621087. The next prime is 26621113. The reversal of 26621091 is 19012662.

It is not a de Polignac number, because 26621091 - 2² = 26621087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26621081) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 211216 + ... + 211341.

Almost surely, 2^26621091 is an apocalyptic number.

26621091 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

26621091 is a deficient number, since it is larger than the sum of its proper divisors (17324941).

26621091 is a wasteful number, since it uses less digits than its factorization.

26621091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422570 (or 422567 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 26621091 is about 5159.5630628959. The cubic root of 26621091 is about 298.5900168739.

The spelling of 26621091 in words is "twenty-six million, six hundred twenty-one thousand, ninety-one".