26985645 has 12 divisors (see below), whose sum is σ = 46775196. Its totient is φ = 14392320.

The previous prime is 26985619. The next prime is 26985659. The reversal of 26985645 is 54658962.

It can be written as a sum of positive squares in 2 ways, for example, as 11634921 + 15350724 = 3411^2 + 3918^2 .

It is not a de Polignac number, because 26985645 - 2¹⁰ = 26984621 is a prime.

It is a super-3 number, since 3×26985645³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 599681 = 26985645 / (2 + 6 + 9 + 8 + 5 + 6 + 4 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 26985645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 299796 + ... + 299885.

It is an arithmetic number, because the mean of its divisors is an integer number (3897933).

Almost surely, 2^26985645 is an apocalyptic number.

It is an amenable number.

26985645 is a deficient number, since it is larger than the sum of its proper divisors (19789551).

26985645 is a wasteful number, since it uses less digits than its factorization.

26985645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599692 (or 599689 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The square root of 26985645 is about 5194.7709285396. The cubic root of 26985645 is about 299.9468239082.

The spelling of 26985645 in words is "twenty-six million, nine hundred eighty-five thousand, six hundred forty-five".