26388769 has 9 divisors (see below), whose sum is σ = 29068081. Its totient is φ = 23938420.

The previous prime is 26388763. The next prime is 26388779. The reversal of 26388769 is 96788362.

The square root of 26388769 is 5137.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 26388769 - 2⁵ = 26388737 is a prime.

It is a super-2 number, since 2×26388769² = 1392734258670722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26388763) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 56274 + ... + 56740.

Almost surely, 2^26388769 is an apocalyptic number.

26388769 is the 5137-th square number.

26388769 is the 2569-th centered octagonal number.

It is an amenable number.

26388769 is a deficient number, since it is larger than the sum of its proper divisors (2679312).

26388769 is an frugal number, since it uses more digits than its factorization.

26388769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 956 (or 478 counting only the distinct ones).

The product of its digits is 870912, while the sum is 49.

The cubic root of 26388769 is about 297.7188804220.

Multiplying 26388769 by its sum of digits (49), we get a square (1293049681 = 35959²).

The spelling of 26388769 in words is "twenty-six million, three hundred eighty-eight thousand, seven hundred sixty-nine".