40539999 has 8 divisors (see below), whose sum is σ = 55917360. Its totient is φ = 26094656.

The previous prime is 40539997. The next prime is 40540001. The reversal of 40539999 is 99993504.

It is an interprime number because it is at equal distance from previous prime (40539997) and next prime (40540001).

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

It is a cyclic number.

It is not a de Polignac number, because 40539999 - 2¹ = 40539997 is a prime.

40539999 is a modest number, since divided by 9999 gives 4053 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40539997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 232902 + ... + 233075.

It is an arithmetic number, because the mean of its divisors is an integer number (6989670).

Almost surely, 2^40539999 is an apocalyptic number.

40539999 is a deficient number, since it is larger than the sum of its proper divisors (15377361).

40539999 is a wasteful number, since it uses less digits than its factorization.

40539999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466009.

The product of its (nonzero) digits is 393660, while the sum is 48.

The square root of 40539999 is about 6367.1028733640. The cubic root of 40539999 is about 343.5272909378.

It can be divided in two parts, 405 and 39999, that added together give a palindrome (40404).

The spelling of 40539999 in words is "forty million, five hundred thirty-nine thousand, nine hundred ninety-nine".