390770 has 16 divisors (see below), whose sum is σ = 734400. Its totient is φ = 149424.

The previous prime is 390763. The next prime is 390781. The reversal of 390770 is 77093.

It is a happy number.

It is an unprimeable number.

390770 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 620 + ... + 1079.

It is an arithmetic number, because the mean of its divisors is an integer number (45900).

2³⁹⁰⁷⁷⁰ is an apocalyptic number.

390770 is a deficient number, since it is larger than the sum of its proper divisors (343630).

390770 is a wasteful number, since it uses less digits than its factorization.

390770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1729.

The product of its (nonzero) digits is 1323, while the sum is 26.

The square root of 390770 is about 625.1159892372. The cubic root of 390770 is about 73.1094872979.

The spelling of 390770 in words is "three hundred ninety thousand, seven hundred seventy".