40243263 has 16 divisors (see below), whose sum is σ = 55549536. Its totient is φ = 25896960.

The previous prime is 40243253. The next prime is 40243279. The reversal of 40243263 is 36234204.

It is a happy number.

It is not a de Polignac number, because 40243263 - 2⁹ = 40242751 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40243223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10245 + ... + 13617.

It is an arithmetic number, because the mean of its divisors is an integer number (3471846).

Almost surely, 2^40243263 is an apocalyptic number.

40243263 is a deficient number, since it is larger than the sum of its proper divisors (15306273).

40243263 is a wasteful number, since it uses less digits than its factorization.

40243263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3514.

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 40243263 is about 6343.7577980248. The cubic root of 40243263 is about 342.6870784312.

Adding to 40243263 its reverse (36234204), we get a palindrome (76477467).

The spelling of 40243263 in words is "forty million, two hundred forty-three thousand, two hundred sixty-three".