40638235 has 8 divisors (see below), whose sum is σ = 53199216. Its totient is φ = 29555040.

The previous prime is 40638187. The next prime is 40638239. The reversal of 40638235 is 53283604.

40638235 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 40638235 - 2⁷ = 40638107 is a prime.

It is a super-2 number, since 2×40638235² = 3302932287830450, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40638197 and 40638206.

It is not an unprimeable number, because it can be changed into a prime (40638239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 369384 + ... + 369493.

It is an arithmetic number, because the mean of its divisors is an integer number (6649902).

Almost surely, 2^40638235 is an apocalyptic number.

40638235 is a deficient number, since it is larger than the sum of its proper divisors (12560981).

40638235 is a wasteful number, since it uses less digits than its factorization.

40638235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738893.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 40638235 is about 6374.8125462636. The cubic root of 40638235 is about 343.8045440721.

The spelling of 40638235 in words is "forty million, six hundred thirty-eight thousand, two hundred thirty-five".