40431105 has 96 divisors (see below), whose sum is σ = 84494592. Its totient is φ = 17625600.

The previous prime is 40431089. The next prime is 40431109. The reversal of 40431105 is 50113404.

It is a happy number.

It is not a de Polignac number, because 40431105 - 2⁴ = 40431089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40431109) 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 95 ways as a sum of consecutive naturals, for example, 392484 + ... + 392586.

It is an arithmetic number, because the mean of its divisors is an integer number (880152).

Almost surely, 2^40431105 is an apocalyptic number.

40431105 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40431105 is an abundant number, since it is smaller than the sum of its proper divisors (44063487).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40431105 is a wasteful number, since it uses less digits than its factorization.

40431105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199 (or 196 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 40431105 is about 6358.5458243218. The cubic root of 40431105 is about 343.2194336315.

Adding to 40431105 its reverse (50113404), we get a palindrome (90544509).

The spelling of 40431105 in words is "forty million, four hundred thirty-one thousand, one hundred five".