43390934 has 4 divisors (see below), whose sum is σ = 65086404. Its totient is φ = 21695466.

The previous prime is 43390871. The next prime is 43390937. The reversal of 43390934 is 43909334.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 43390894 and 43390903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43390937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10847732 + ... + 10847735.

It is an arithmetic number, because the mean of its divisors is an integer number (16271601).

Almost surely, 2^43390934 is an apocalyptic number.

43390934 is a deficient number, since it is larger than the sum of its proper divisors (21695470).

43390934 is a wasteful number, since it uses less digits than its factorization.

43390934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21695469.

The product of its (nonzero) digits is 34992, while the sum is 35.

The square root of 43390934 is about 6587.1795178210. The cubic root of 43390934 is about 351.3983081280.

Subtracting 43390934 from its reverse (43909334), we obtain a square (518400 = 720²).

The spelling of 43390934 in words is "forty-three million, three hundred ninety thousand, nine hundred thirty-four".