40089243 has 4 divisors (see below), whose sum is σ = 53452328. Its totient is φ = 26726160.

The previous prime is 40089239. The next prime is 40089251. The reversal of 40089243 is 34298004.

It is a happy number.

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

It is not a de Polignac number, because 40089243 - 2² = 40089239 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40089243.

It is not an unprimeable number, because it can be changed into a prime (40089233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6681538 + ... + 6681543.

It is an arithmetic number, because the mean of its divisors is an integer number (13363082).

Almost surely, 2^40089243 is an apocalyptic number.

40089243 is a deficient number, since it is larger than the sum of its proper divisors (13363085).

40089243 is a wasteful number, since it uses less digits than its factorization.

40089243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13363084.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 40089243 is about 6331.6066681372. The cubic root of 40089243 is about 342.2493393920.

The spelling of 40089243 in words is "forty million, eighty-nine thousand, two hundred forty-three".