26878457 has 8 divisors (see below), whose sum is σ = 28161792. Its totient is φ = 25621200.

The previous prime is 26878451. The next prime is 26878459. The reversal of 26878457 is 75487862.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 26878457 - 2⁶ = 26878393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26878451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4394 + ... + 8547.

It is an arithmetic number, because the mean of its divisors is an integer number (3520224).

Almost surely, 2^26878457 is an apocalyptic number.

It is an amenable number.

26878457 is a deficient number, since it is larger than the sum of its proper divisors (1283335).

26878457 is a wasteful number, since it uses less digits than its factorization.

26878457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13039.

The product of its digits is 752640, while the sum is 47.

The square root of 26878457 is about 5184.4437502976. The cubic root of 26878457 is about 299.5491635685.

The spelling of 26878457 in words is "twenty-six million, eight hundred seventy-eight thousand, four hundred fifty-seven".