40638203 has 4 divisors (see below), whose sum is σ = 40680528. Its totient is φ = 40595880.

The previous prime is 40638187. The next prime is 40638239. The reversal of 40638203 is 30283604.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40638203 - 2⁴ = 40638187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40638803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19688 + ... + 21653.

It is an arithmetic number, because the mean of its divisors is an integer number (10170132).

Almost surely, 2^40638203 is an apocalyptic number.

40638203 is a deficient number, since it is larger than the sum of its proper divisors (42325).

40638203 is an equidigital number, since it uses as much as digits as its factorization.

40638203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42324.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 40638203 is about 6374.8100363854. The cubic root of 40638203 is about 343.8044538308.

The spelling of 40638203 in words is "forty million, six hundred thirty-eight thousand, two hundred three".