40638435 has 16 divisors (see below), whose sum is σ = 68444160. Its totient is φ = 20532960.

The previous prime is 40638413. The next prime is 40638463. The reversal of 40638435 is 53483604.

It is not a de Polignac number, because 40638435 - 2⁶ = 40638371 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40638396 and 40638405.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71011 + ... + 71580.

It is an arithmetic number, because the mean of its divisors is an integer number (4277760).

Almost surely, 2^40638435 is an apocalyptic number.

40638435 is a deficient number, since it is larger than the sum of its proper divisors (27805725).

40638435 is a wasteful number, since it uses less digits than its factorization.

40638435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142618.

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 40638435 is about 6374.8282329801. The cubic root of 40638435 is about 343.8051080795.

The spelling of 40638435 in words is "forty million, six hundred thirty-eight thousand, four hundred thirty-five".