40100809 has 8 divisors (see below), whose sum is σ = 45904320. Its totient is φ = 34316016.

The previous prime is 40100791. The next prime is 40100813. The reversal of 40100809 is 90800104.

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

It is not a de Polignac number, because 40100809 - 2⁵ = 40100777 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40100809.

It is not an unprimeable number, because it can be changed into a prime (40100839) 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, 267 + ... + 8959.

It is an arithmetic number, because the mean of its divisors is an integer number (5738040).

Almost surely, 2^40100809 is an apocalyptic number.

It is an amenable number.

40100809 is a deficient number, since it is larger than the sum of its proper divisors (5803511).

40100809 is an equidigital number, since it uses as much as digits as its factorization.

40100809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9359.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 40100809 is about 6332.5199565418. The cubic root of 40100809 is about 342.2822499265.

The spelling of 40100809 in words is "forty million, one hundred thousand, eight hundred nine".