26878939 has 4 divisors (see below), whose sum is σ = 28293640. Its totient is φ = 25464240.

The previous prime is 26878937. The next prime is 26878949. The reversal of 26878939 is 93987862.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93987862 = 2 ⋅46993931.

It is a cyclic number.

It is not a de Polignac number, because 26878939 - 2¹ = 26878937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26878937) 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, 707322 + ... + 707359.

It is an arithmetic number, because the mean of its divisors is an integer number (7073410).

Almost surely, 2^26878939 is an apocalyptic number.

26878939 is a deficient number, since it is larger than the sum of its proper divisors (1414701).

26878939 is a wasteful number, since it uses less digits than its factorization.

26878939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1414700.

The product of its digits is 1306368, while the sum is 52.

The square root of 26878939 is about 5184.4902353076. The cubic root of 26878939 is about 299.5509541206.

The spelling of 26878939 in words is "twenty-six million, eight hundred seventy-eight thousand, nine hundred thirty-nine".