43648965 has 12 divisors (see below), whose sum is σ = 75658284. Its totient is φ = 23279424.

The previous prime is 43648949. The next prime is 43648981. The reversal of 43648965 is 56984634.

It is an interprime number because it is at equal distance from previous prime (43648949) and next prime (43648981).

It can be written as a sum of positive squares in 2 ways, for example, as 10850436 + 32798529 = 3294^2 + 5727^2 .

It is not a de Polignac number, because 43648965 - 2⁴ = 43648949 is a prime.

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: 969977 = 43648965 / (4 + 3 + 6 + 4 + 8 + 9 + 6 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 43648965.

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, 484944 + ... + 485033.

It is an arithmetic number, because the mean of its divisors is an integer number (6304857).

Almost surely, 2^43648965 is an apocalyptic number.

43648965 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

43648965 is a deficient number, since it is larger than the sum of its proper divisors (32009319).

43648965 is a wasteful number, since it uses less digits than its factorization.

43648965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 969988 (or 969985 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The square root of 43648965 is about 6606.7363349842. The cubic root of 43648965 is about 352.0934803591.

The spelling of 43648965 in words is "forty-three million, six hundred forty-eight thousand, nine hundred sixty-five".