26691964 has 12 divisors (see below), whose sum is σ = 50304184. Its totient is φ = 12319344.

The previous prime is 26691947. The next prime is 26691991. The reversal of 26691964 is 46919662.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 26691964.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256602 + ... + 256705.

Almost surely, 2^26691964 is an apocalyptic number.

It is an amenable number.

26691964 is a deficient number, since it is larger than the sum of its proper divisors (23612220).

26691964 is a wasteful number, since it uses less digits than its factorization.

26691964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513324 (or 513322 counting only the distinct ones).

The product of its digits is 139968, while the sum is 43.

The square root of 26691964 is about 5166.4266180795. The cubic root of 26691964 is about 298.8547595703.

It can be divided in two parts, 2 and 6691964, that added together give a palindrome (6691966).

The spelling of 26691964 in words is "twenty-six million, six hundred ninety-one thousand, nine hundred sixty-four".