390878 has 8 divisors (see below), whose sum is σ = 595272. Its totient is φ = 192456.

The previous prime is 390877. The next prime is 390883. The reversal of 390878 is 878093.

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

It is a super-3 number, since 3×390878³ = 179161602033348456, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390877) 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, 1325 + ... + 1592.

It is an arithmetic number, because the mean of its divisors is an integer number (74409).

2³⁹⁰⁸⁷⁸ is an apocalyptic number.

390878 is a deficient number, since it is larger than the sum of its proper divisors (204394).

390878 is a wasteful number, since it uses less digits than its factorization.

390878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2986.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 390878 is about 625.2023672380. The cubic root of 390878 is about 73.1162219477.

The spelling of 390878 in words is "three hundred ninety thousand, eight hundred seventy-eight".