40817389 has 4 divisors (see below), whose sum is σ = 40919580. Its totient is φ = 40715200.

The previous prime is 40817347. The next prime is 40817407. The reversal of 40817389 is 98371804.

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 32114889 + 8702500 = 5667^2 + 2950^2 .

It is a cyclic number.

It is not a de Polignac number, because 40817389 - 2⁹ = 40816877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40812389) 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, 50494 + ... + 51295.

It is an arithmetic number, because the mean of its divisors is an integer number (10229895).

Almost surely, 2^40817389 is an apocalyptic number.

It is an amenable number.

40817389 is a deficient number, since it is larger than the sum of its proper divisors (102191).

40817389 is a wasteful number, since it uses less digits than its factorization.

40817389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102190.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 40817389 is about 6388.8488008404. The cubic root of 40817389 is about 344.3090251995.

The spelling of 40817389 in words is "forty million, eight hundred seventeen thousand, three hundred eighty-nine".