478690 has 8 divisors (see below), whose sum is σ = 861660. Its totient is φ = 191472.

The previous prime is 478679. The next prime is 478697. The reversal of 478690 is 96874.

It can be written as a sum of positive squares in 2 ways, for example, as 474721 + 3969 = 689^2 + 63^2 .

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

It is a super-2 number, since 2×478690² = 458288232200, which contains 22 as substring.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (478697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23925 + ... + 23944.

2⁴⁷⁸⁶⁹⁰ is an apocalyptic number.

478690 is a deficient number, since it is larger than the sum of its proper divisors (382970).

478690 is a wasteful number, since it uses less digits than its factorization.

478690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47876.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 478690 is about 691.8742660339. The cubic root of 478690 is about 78.2260590847.

The spelling of 478690 in words is "four hundred seventy-eight thousand, six hundred ninety".