40819145 has 4 divisors (see below), whose sum is σ = 48982980. Its totient is φ = 32655312.

The previous prime is 40819133. The next prime is 40819199. The reversal of 40819145 is 54191804.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8340544 + 32478601 = 2888^2 + 5699^2 .

It is a cyclic number.

It is not a de Polignac number, because 40819145 - 2¹⁰ = 40818121 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4081910 + ... + 4081919.

It is an arithmetic number, because the mean of its divisors is an integer number (12245745).

Almost surely, 2^40819145 is an apocalyptic number.

It is an amenable number.

40819145 is a deficient number, since it is larger than the sum of its proper divisors (8163835).

40819145 is an equidigital number, since it uses as much as digits as its factorization.

40819145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8163834.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 40819145 is about 6388.9862263117. The cubic root of 40819145 is about 344.3139626211.

The spelling of 40819145 in words is "forty million, eight hundred nineteen thousand, one hundred forty-five".