40809419 has 4 divisors (see below), whose sum is σ = 46639344. Its totient is φ = 34979496.

The previous prime is 40809413. The next prime is 40809463. The reversal of 40809419 is 91490804.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40809419 - 2²⁰ = 39760843 is a prime.

It is a super-2 number, since 2×40809419² = 3330817358235122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40809413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2914952 + ... + 2914965.

It is an arithmetic number, because the mean of its divisors is an integer number (11659836).

Almost surely, 2^40809419 is an apocalyptic number.

40809419 is a deficient number, since it is larger than the sum of its proper divisors (5829925).

40809419 is an equidigital number, since it uses as much as digits as its factorization.

40809419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5829924.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 40809419 is about 6388.2250273452. The cubic root of 40809419 is about 344.2866138235.

The spelling of 40809419 in words is "forty million, eight hundred nine thousand, four hundred nineteen".