8520394 has 8 divisors (see below), whose sum is σ = 12851748. Its totient is φ = 4236480.

The previous prime is 8520389. The next prime is 8520401. The reversal of 8520394 is 4930258.

It can be written as a sum of positive squares in 2 ways, for example, as 7049025 + 1471369 = 2655^2 + 1213^2 .

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

It is a super-2 number, since 2×8520394² = 145194227830472, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11407 + ... + 12130.

Almost surely, 2^8520394 is an apocalyptic number.

8520394 is a deficient number, since it is larger than the sum of its proper divisors (4331354).

8520394 is a wasteful number, since it uses less digits than its factorization.

8520394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23720.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 8520394 is about 2918.9713941730. The cubic root of 8520394 is about 204.2458429180.

The spelling of 8520394 in words is "eight million, five hundred twenty thousand, three hundred ninety-four".