8723645 has 16 divisors (see below), whose sum is σ = 12019968. Its totient is φ = 5953920.

The previous prime is 8723639. The next prime is 8723653. The reversal of 8723645 is 5463278.

It is a happy number.

8723645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8723645 - 2¹⁰ = 8722621 is a prime.

It is a super-2 number, since 2×8723645² = 152203964172050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9392 + ... + 10278.

It is an arithmetic number, because the mean of its divisors is an integer number (751248).

Almost surely, 2^8723645 is an apocalyptic number.

It is an amenable number.

8723645 is a deficient number, since it is larger than the sum of its proper divisors (3296323).

8723645 is a wasteful number, since it uses less digits than its factorization.

8723645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1180.

The product of its digits is 40320, while the sum is 35.

The square root of 8723645 is about 2953.5817239413. The cubic root of 8723645 is about 205.8571684040.

It can be divided in two parts, 8723 and 645, that multiplied together give a triangular number (5626335 = T₃₃₅₄).

The spelling of 8723645 in words is "eight million, seven hundred twenty-three thousand, six hundred forty-five".