26678645 has 16 divisors (see below), whose sum is σ = 36955008. Its totient is φ = 18110400.

The previous prime is 26678633. The next prime is 26678647. The reversal of 26678645 is 54687662.

It is not a de Polignac number, because 26678645 - 2¹⁸ = 26416501 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 26678596 and 26678605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26678647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 239 + ... + 7308.

It is an arithmetic number, because the mean of its divisors is an integer number (2309688).

Almost surely, 2^26678645 is an apocalyptic number.

It is an amenable number.

26678645 is a deficient number, since it is larger than the sum of its proper divisors (10276363).

26678645 is a wasteful number, since it uses less digits than its factorization.

26678645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7660.

The product of its digits is 483840, while the sum is 44.

The square root of 26678645 is about 5165.1374618688. The cubic root of 26678645 is about 298.8050428742.

It can be divided in two parts, 26 and 678645, that multiplied together give a triangular number (17644770 = T₅₉₄₀).

The spelling of 26678645 in words is "twenty-six million, six hundred seventy-eight thousand, six hundred forty-five".