40305243 has 16 divisors (see below), whose sum is σ = 58899456. Its totient is φ = 24313440.

The previous prime is 40305241. The next prime is 40305253. The reversal of 40305243 is 34250304.

It is a happy number.

It is not a de Polignac number, because 40305243 - 2¹ = 40305241 is a prime.

It is a super-2 number, since 2×40305243² = 3249025226578098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40305241) 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, 4621 + ... + 10097.

It is an arithmetic number, because the mean of its divisors is an integer number (3681216).

Almost surely, 2^40305243 is an apocalyptic number.

40305243 is a deficient number, since it is larger than the sum of its proper divisors (18594213).

40305243 is a wasteful number, since it uses less digits than its factorization.

40305243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5714.

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 40305243 is about 6348.6410356863. The cubic root of 40305243 is about 342.8629161478.

Adding to 40305243 its reverse (34250304), we get a palindrome (74555547).

The spelling of 40305243 in words is "forty million, three hundred five thousand, two hundred forty-three".