40304523 has 16 divisors (see below), whose sum is σ = 61525760. Its totient is φ = 22990176.

The previous prime is 40304503. The next prime is 40304527. The reversal of 40304523 is 32540304.

It is a happy number.

It is not a de Polignac number, because 40304523 - 2¹⁰ = 40303499 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

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 40304523.

It is not an unprimeable number, because it can be changed into a prime (40304527) 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 15 ways as a sum of consecutive naturals, for example, 13536 + ... + 16242.

It is an arithmetic number, because the mean of its divisors is an integer number (3845360).

Almost surely, 2^40304523 is an apocalyptic number.

40304523 is a deficient number, since it is larger than the sum of its proper divisors (21221237).

40304523 is a wasteful number, since it uses less digits than its factorization.

40304523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3426.

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

The square root of 40304523 is about 6348.5843303842. The cubic root of 40304523 is about 342.8608745378.

Adding to 40304523 its reverse (32540304), we get a palindrome (72844827).

The spelling of 40304523 in words is "forty million, three hundred four thousand, five hundred twenty-three".