40400003 has 8 divisors (see below), whose sum is σ = 46298208. Its totient is φ = 34533504.

The previous prime is 40399981. The next prime is 40400011. The reversal of 40400003 is 30000404.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40400003 - 2¹² = 40395907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40400033) 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 7 ways as a sum of consecutive naturals, for example, 5126 + ... + 10347.

It is an arithmetic number, because the mean of its divisors is an integer number (5787276).

Almost surely, 2^40400003 is an apocalyptic number.

40400003 is a deficient number, since it is larger than the sum of its proper divisors (5898205).

40400003 is a wasteful number, since it uses less digits than its factorization.

40400003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15853.

The product of its (nonzero) digits is 48, while the sum is 11.

The square root of 40400003 is about 6356.0996688221. The cubic root of 40400003 is about 343.1314028177.

Adding to 40400003 its reverse (30000404), we get a palindrome (70400407).

The spelling of 40400003 in words is "forty million, four hundred thousand, three".