40509995 has 8 divisors (see below), whose sum is σ = 51170640. Its totient is φ = 30702240.

The previous prime is 40509991. The next prime is 40510007. The reversal of 40509995 is 59990504.

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

It is not a de Polignac number, because 40509995 - 2² = 40509991 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40509991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213116 + ... + 213305.

It is an arithmetic number, because the mean of its divisors is an integer number (6396330).

Almost surely, 2^40509995 is an apocalyptic number.

40509995 is a deficient number, since it is larger than the sum of its proper divisors (10660645).

40509995 is a wasteful number, since it uses less digits than its factorization.

40509995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426445.

The product of its (nonzero) digits is 72900, while the sum is 41.

The square root of 40509995 is about 6364.7462635992. The cubic root of 40509995 is about 343.4425208593.

The spelling of 40509995 in words is "forty million, five hundred nine thousand, nine hundred ninety-five".