8620645 has 12 divisors (see below), whose sum is σ = 11371500. Its totient is φ = 6269120.

The previous prime is 8620639. The next prime is 8620663. The reversal of 8620645 is 5460268.

It can be written as a sum of positive squares in 2 ways, for example, as 4743684 + 3876961 = 2178^2 + 1969^2 .

It is not a de Polignac number, because 8620645 - 2³ = 8620637 is a prime.

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, 6520 + ... + 7729.

It is an arithmetic number, because the mean of its divisors is an integer number (947625).

Almost surely, 2^8620645 is an apocalyptic number.

It is an amenable number.

8620645 is a deficient number, since it is larger than the sum of its proper divisors (2750855).

8620645 is a wasteful number, since it uses less digits than its factorization.

8620645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14276 (or 14265 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 8620645 is about 2936.0934930618. The cubic root of 8620645 is about 205.0437741144.

The spelling of 8620645 in words is "eight million, six hundred twenty thousand, six hundred forty-five".