43249390 has 16 divisors (see below), whose sum is σ = 78653232. Its totient is φ = 17121024.

The previous prime is 43249387. The next prime is 43249399. The reversal of 43249390 is 9394234.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43249399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21324 + ... + 23263.

It is an arithmetic number, because the mean of its divisors is an integer number (4915827).

Almost surely, 2^43249390 is an apocalyptic number.

43249390 is a deficient number, since it is larger than the sum of its proper divisors (35403842).

43249390 is a wasteful number, since it uses less digits than its factorization.

43249390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44691.

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 43249390 is about 6576.4268413782. The cubic root of 43249390 is about 351.0157973209.

The spelling of 43249390 in words is "forty-three million, two hundred forty-nine thousand, three hundred ninety".