390478 has 8 divisors (see below), whose sum is σ = 639000. Its totient is φ = 177480.

The previous prime is 390463. The next prime is 390479. The reversal of 390478 is 874093.

It is a happy number.

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

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390479) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8853 + ... + 8896.

It is an arithmetic number, because the mean of its divisors is an integer number (79875).

2³⁹⁰⁴⁷⁸ is an apocalyptic number.

390478 is a deficient number, since it is larger than the sum of its proper divisors (248522).

390478 is a wasteful number, since it uses less digits than its factorization.

390478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17762.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 390478 is about 624.8823889341. The cubic root of 390478 is about 73.0912725852.

It can be divided in two parts, 390 and 478, that added together give a palindrome (868).

The spelling of 390478 in words is "three hundred ninety thousand, four hundred seventy-eight".