26406649 has 4 divisors (see below), whose sum is σ = 26417664. Its totient is φ = 26395636.

The previous prime is 26406629. The next prime is 26406659. The reversal of 26406649 is 94660462.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 26406649 - 2⁷ = 26406521 is a prime.

It is a super-2 number, since 2×26406649² = 1394622222818402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26406629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217 + ... + 7270.

It is an arithmetic number, because the mean of its divisors is an integer number (6604416).

Almost surely, 2^26406649 is an apocalyptic number.

It is an amenable number.

26406649 is a deficient number, since it is larger than the sum of its proper divisors (11015).

26406649 is an equidigital number, since it uses as much as digits as its factorization.

26406649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11014.

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 26406649 is about 5138.7400206665. The cubic root of 26406649 is about 297.7861061392.

The spelling of 26406649 in words is "twenty-six million, four hundred six thousand, six hundred forty-nine".