6478381 has 8 divisors (see below), whose sum is σ = 7973504. Its totient is φ = 5125680.

The previous prime is 6478379. The next prime is 6478421. The reversal of 6478381 is 1838746.

It is a happy number.

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

It is not a de Polignac number, because 6478381 - 2¹ = 6478379 is a prime.

It is a super-2 number, since 2×6478381² = 83938840762322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6478381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6478301) 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, 35505 + ... + 35686.

It is an arithmetic number, because the mean of its divisors is an integer number (996688).

Almost surely, 2^6478381 is an apocalyptic number.

It is an amenable number.

6478381 is a deficient number, since it is larger than the sum of its proper divisors (1495123).

6478381 is a wasteful number, since it uses less digits than its factorization.

6478381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71211.

The product of its digits is 32256, while the sum is 37.

The square root of 6478381 is about 2545.2663907733. The cubic root of 6478381 is about 186.4184224917.

It can be divided in two parts, 6478 and 381, that added together give a cube (6859 = 19³).

The spelling of 6478381 in words is "six million, four hundred seventy-eight thousand, three hundred eighty-one".