390886 has 4 divisors (see below), whose sum is σ = 586332. Its totient is φ = 195442.

The previous prime is 390883. The next prime is 390889. The reversal of 390886 is 688093.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 688093 = 7 ⋅98299.

It is an interprime number because it is at equal distance from previous prime (390883) and next prime (390889).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390883) 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 as a sum of consecutive naturals, namely, 97720 + ... + 97723.

It is an arithmetic number, because the mean of its divisors is an integer number (146583).

2³⁹⁰⁸⁸⁶ is an apocalyptic number.

390886 is a deficient number, since it is larger than the sum of its proper divisors (195446).

390886 is a wasteful number, since it uses less digits than its factorization.

390886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195445.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 390886 is about 625.2087651337. The cubic root of 390886 is about 73.1167207613.

The spelling of 390886 in words is "three hundred ninety thousand, eight hundred eighty-six".