8490381 has 8 divisors (see below), whose sum is σ = 11812800. Its totient is φ = 5414112.

The previous prime is 8490379. The next prime is 8490389. The reversal of 8490381 is 1830948.

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

It is not a de Polignac number, because 8490381 - 2¹ = 8490379 is a prime.

It is a super-2 number, since 2×8490381² = 144173139050322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8490389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61456 + ... + 61593.

It is an arithmetic number, because the mean of its divisors is an integer number (1476600).

Almost surely, 2^8490381 is an apocalyptic number.

It is an amenable number.

8490381 is a deficient number, since it is larger than the sum of its proper divisors (3322419).

8490381 is a wasteful number, since it uses less digits than its factorization.

8490381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123075.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 8490381 is about 2913.8258355640. The cubic root of 8490381 is about 204.0057428218.

The spelling of 8490381 in words is "eight million, four hundred ninety thousand, three hundred eighty-one".