390078 has 24 divisors (see below), whose sum is σ = 910728. Its totient is φ = 119952.

The previous prime is 390077. The next prime is 390083. The reversal of 390078 is 870093.

It is a happy number.

390078 is nontrivially palindromic in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390077) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 600 + ... + 1067.

It is an arithmetic number, because the mean of its divisors is an integer number (37947).

2³⁹⁰⁰⁷⁸ is an apocalyptic number.

390078 is an abundant number, since it is smaller than the sum of its proper divisors (520650).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

390078 is a wasteful number, since it uses less digits than its factorization.

390078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1688 (or 1685 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 390078 is about 624.5622466976. The cubic root of 390078 is about 73.0663061783.

The spelling of 390078 in words is "three hundred ninety thousand, seventy-eight".