40854639 has 16 divisors (see below), whose sum is σ = 62467328. Its totient is φ = 23265792.

The previous prime is 40854631. The next prime is 40854659. The reversal of 40854639 is 93645804.

It is not a de Polignac number, because 40854639 - 2³ = 40854631 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 40854597 and 40854606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40854631) 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, 3279 + ... + 9615.

It is an arithmetic number, because the mean of its divisors is an integer number (3904208).

Almost surely, 2^40854639 is an apocalyptic number.

40854639 is a deficient number, since it is larger than the sum of its proper divisors (21612689).

40854639 is a wasteful number, since it uses less digits than its factorization.

40854639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6654.

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 40854639 is about 6391.7633717152. The cubic root of 40854639 is about 344.4137323023.

The spelling of 40854639 in words is "forty million, eight hundred fifty-four thousand, six hundred thirty-nine".