40405233 has 16 divisors (see below), whose sum is σ = 59325696. Its totient is φ = 24257040.

The previous prime is 40405231. The next prime is 40405237. The reversal of 40405233 is 33250404.

It is a happy number.

It is not a de Polignac number, because 40405233 - 2¹ = 40405231 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40405231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2191 + ... + 9252.

It is an arithmetic number, because the mean of its divisors is an integer number (3707856).

Almost surely, 2^40405233 is an apocalyptic number.

It is an amenable number.

40405233 is a deficient number, since it is larger than the sum of its proper divisors (18920463).

40405233 is a wasteful number, since it uses less digits than its factorization.

40405233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11564.

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

The square root of 40405233 is about 6356.5110713347. The cubic root of 40405233 is about 343.1462089206.

Adding to 40405233 its reverse (33250404), we get a palindrome (73655637).

The spelling of 40405233 in words is "forty million, four hundred five thousand, two hundred thirty-three".