40638441 has 16 divisors (see below), whose sum is σ = 55036800. Its totient is φ = 26669568.

The previous prime is 40638413. The next prime is 40638463. The reversal of 40638441 is 14483604.

It is not a de Polignac number, because 40638441 - 2¹⁰ = 40637417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40638399 and 40638408.

It is not an unprimeable number, because it can be changed into a prime (40638491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104275 + ... + 104663.

It is an arithmetic number, because the mean of its divisors is an integer number (3439800).

Almost surely, 2^40638441 is an apocalyptic number.

It is an amenable number.

40638441 is a deficient number, since it is larger than the sum of its proper divisors (14398359).

40638441 is a wasteful number, since it uses less digits than its factorization.

40638441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848.

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 40638441 is about 6374.8287035810. The cubic root of 40638441 is about 343.8051249997.

The spelling of 40638441 in words is "forty million, six hundred thirty-eight thousand, four hundred forty-one".