4689945 has 24 divisors (see below), whose sum is σ = 8755656. Its totient is φ = 2308608.

The previous prime is 4689911. The next prime is 4689947. The reversal of 4689945 is 5499864.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 127449 + 4562496 = 357^2 + 2136^2 .

It is not a de Polignac number, because 4689945 - 2⁸ = 4689689 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 4689945.

It is not an unprimeable number, because it can be changed into a prime (4689947) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3424 + ... + 4593.

It is an arithmetic number, because the mean of its divisors is an integer number (364819).

Almost surely, 2^4689945 is an apocalyptic number.

4689945 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4689945 is a deficient number, since it is larger than the sum of its proper divisors (4065711).

4689945 is a wasteful number, since it uses less digits than its factorization.

4689945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8041 (or 8038 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 4689945 is about 2165.6280844134. The cubic root of 4689945 is about 167.3873304817.

The spelling of 4689945 in words is "four million, six hundred eighty-nine thousand, nine hundred forty-five".