38218597405 has 8 divisors (see below), whose sum is σ = 47101839192. Its totient is φ = 29748529728.

The previous prime is 38218597399. The next prime is 38218597457. The reversal of 38218597405 is 50479581283.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13132472409 + 25086124996 = 114597^2 + 158386^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 38218597405 - 2¹⁷ = 38218466333 is a prime.

It is a super-2 number, since 2×38218597405² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103293322 + ... + 103293691.

It is an arithmetic number, because the mean of its divisors is an integer number (5887729899).

Almost surely, 2^38218597405 is an apocalyptic number.

It is an amenable number.

38218597405 is a deficient number, since it is larger than the sum of its proper divisors (8883241787).

38218597405 is a wasteful number, since it uses less digits than its factorization.

38218597405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206587055.

The product of its (nonzero) digits is 2419200, while the sum is 52.

The spelling of 38218597405 in words is "thirty-eight billion, two hundred eighteen million, five hundred ninety-seven thousand, four hundred five".