26897538 has 16 divisors (see below), whose sum is σ = 54023040. Its totient is φ = 8927856.

The previous prime is 26897537. The next prime is 26897539. The reversal of 26897538 is 83579862.

It is an interprime number because it is at equal distance from previous prime (26897537) and next prime (26897539).

It is a super-2 number, since 2×26897538² = 1446955100922888, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (26897537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7945 + ... + 10812.

It is an arithmetic number, because the mean of its divisors is an integer number (3376440).

Almost surely, 2^26897538 is an apocalyptic number.

26897538 is an abundant number, since it is smaller than the sum of its proper divisors (27125502).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26897538 is a wasteful number, since it uses less digits than its factorization.

26897538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19001.

The product of its digits is 725760, while the sum is 48.

The square root of 26897538 is about 5186.2836405272. The cubic root of 26897538 is about 299.6200300571.

The spelling of 26897538 in words is "twenty-six million, eight hundred ninety-seven thousand, five hundred thirty-eight".