40403430 has 24 divisors (see below), whose sum is σ = 105049152. Its totient is φ = 10774224.

The previous prime is 40403417. The next prime is 40403449. The reversal of 40403430 is 3430404.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 224374 + ... + 224553.

It is an arithmetic number, because the mean of its divisors is an integer number (4377048).

Almost surely, 2^40403430 is an apocalyptic number.

40403430 is an abundant number, since it is smaller than the sum of its proper divisors (64645722).

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

40403430 is a wasteful number, since it uses less digits than its factorization.

40403430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448940 (or 448937 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 40403430 is about 6356.3692466690. The cubic root of 40403430 is about 343.1411047812.

Adding to 40403430 its reverse (3430404), we get a palindrome (43833834).

The spelling of 40403430 in words is "forty million, four hundred three thousand, four hundred thirty".