43388961 has 24 divisors (see below), whose sum is σ = 73417824. Its totient is φ = 22538880.

The previous prime is 43388957. The next prime is 43388977. The reversal of 43388961 is 16988334.

It is a happy number.

It is not a de Polignac number, because 43388961 - 2² = 43388957 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (43388911) 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, 11800 + ... + 15033.

It is an arithmetic number, because the mean of its divisors is an integer number (3059076).

Almost surely, 2^43388961 is an apocalyptic number.

It is an amenable number.

43388961 is a deficient number, since it is larger than the sum of its proper divisors (30028863).

43388961 is a wasteful number, since it uses less digits than its factorization.

43388961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26861 (or 26854 counting only the distinct ones).

The product of its digits is 124416, while the sum is 42.

The square root of 43388961 is about 6587.0297555120. The cubic root of 43388961 is about 351.3929819818.

The spelling of 43388961 in words is "forty-three million, three hundred eighty-eight thousand, nine hundred sixty-one".