397790 has 8 divisors (see below), whose sum is σ = 716040. Its totient is φ = 159112.

The previous prime is 397763. The next prime is 397799. The reversal of 397790 is 97793.

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

It is a Curzon number.

It is a zygodrome in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 397790.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397799) 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, 19880 + ... + 19899.

It is an arithmetic number, because the mean of its divisors is an integer number (89505).

2³⁹⁷⁷⁹⁰ is an apocalyptic number.

397790 is a deficient number, since it is larger than the sum of its proper divisors (318250).

397790 is a wasteful number, since it uses less digits than its factorization.

397790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39786.

The product of its (nonzero) digits is 11907, while the sum is 35.

The square root of 397790 is about 630.7059536741. The cubic root of 397790 is about 73.5446841374.

It can be divided in two parts, 39 and 7790, that multiplied together give a triangular number (303810 = T₇₇₉).

The spelling of 397790 in words is "three hundred ninety-seven thousand, seven hundred ninety".