26621489 has 4 divisors (see below), whose sum is σ = 28022640. Its totient is φ = 25220340.

The previous prime is 26621471. The next prime is 26621509. The reversal of 26621489 is 98412662.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26621489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26621459) 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, 700547 + ... + 700584.

It is an arithmetic number, because the mean of its divisors is an integer number (7005660).

Almost surely, 2^26621489 is an apocalyptic number.

It is an amenable number.

26621489 is a deficient number, since it is larger than the sum of its proper divisors (1401151).

26621489 is a wasteful number, since it uses less digits than its factorization.

26621489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1401150.

The product of its digits is 41472, while the sum is 38.

The square root of 26621489 is about 5159.6016319092. The cubic root of 26621489 is about 298.5915048950.

The spelling of 26621489 in words is "twenty-six million, six hundred twenty-one thousand, four hundred eighty-nine".