478857381 has 8 divisors (see below), whose sum is σ = 648943584. Its totient is φ = 314004720.

The previous prime is 478857359. The next prime is 478857397. The reversal of 478857381 is 183758874.

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

It is not a de Polignac number, because 478857381 - 2⁵ = 478857349 is a prime.

It is a super-2 number, since 2×478857381² = 458608782676358322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478857311) by changing a digit.

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, 1308171 + ... + 1308536.

It is an arithmetic number, because the mean of its divisors is an integer number (81117948).

Almost surely, 2^478857381 is an apocalyptic number.

It is an amenable number.

478857381 is a deficient number, since it is larger than the sum of its proper divisors (170086203).

478857381 is a wasteful number, since it uses less digits than its factorization.

478857381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2616771.

The product of its digits is 1505280, while the sum is 51.

The square root of 478857381 is about 21882.8101714565. The cubic root of 478857381 is about 782.3517565294.

The spelling of 478857381 in words is "four hundred seventy-eight million, eight hundred fifty-seven thousand, three hundred eighty-one".