8726645 has 8 divisors (see below), whose sum is σ = 10727640. Its totient is φ = 6810880.

The previous prime is 8726633. The next prime is 8726647. The reversal of 8726645 is 5466278.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 529 + 8726116 = 23^2 + 2954^2 .

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

It is not a de Polignac number, because 8726645 - 2¹⁰ = 8725621 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 8726599 and 8726608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8726647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21080 + ... + 21489.

It is an arithmetic number, because the mean of its divisors is an integer number (1340955).

Almost surely, 2^8726645 is an apocalyptic number.

It is an amenable number.

8726645 is a deficient number, since it is larger than the sum of its proper divisors (2000995).

8726645 is a wasteful number, since it uses less digits than its factorization.

8726645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42615.

The product of its digits is 80640, while the sum is 38.

The square root of 8726645 is about 2954.0895382503. The cubic root of 8726645 is about 205.8807633091.

The spelling of 8726645 in words is "eight million, seven hundred twenty-six thousand, six hundred forty-five".