397785 has 16 divisors (see below), whose sum is σ = 664704. Its totient is φ = 202752.

The previous prime is 397763. The next prime is 397799. The reversal of 397785 is 587793.

It is not a de Polignac number, because 397785 - 2⁵ = 397753 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 232 + ... + 921.

It is an arithmetic number, because the mean of its divisors is an integer number (41544).

2³⁹⁷⁷⁸⁵ is an apocalyptic number.

It is an amenable number.

397785 is a deficient number, since it is larger than the sum of its proper divisors (266919).

397785 is a wasteful number, since it uses less digits than its factorization.

397785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1184.

The product of its digits is 52920, while the sum is 39.

The square root of 397785 is about 630.7019898494. The cubic root of 397785 is about 73.5443759975.

Subtracting from 397785 its product of digits (52920), we obtain a triangular number (344865 = T₈₃₀).

The spelling of 397785 in words is "three hundred ninety-seven thousand, seven hundred eighty-five".