397836 has 36 divisors (see below), whose sum is σ = 1033032. Its totient is φ = 129024.

The previous prime is 397829. The next prime is 397849. The reversal of 397836 is 638793.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a d-powerful number, because it can be written as 3⁴ + 9² + 8 + 7⁶ + 3⁴ + 6⁷ .

It is a self number, because there is not a number n which added to its sum of digits gives 397836.

It is an unprimeable number.

397836 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 11 ways as a sum of consecutive naturals, for example, 1420 + ... + 1676.

2³⁹⁷⁸³⁶ is an apocalyptic number.

397836 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 397836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (516516).

397836 is an abundant number, since it is smaller than the sum of its proper divisors (635196).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

397836 is a wasteful number, since it uses less digits than its factorization.

397836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310 (or 305 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 397836 is about 630.7424196929. The cubic root of 397836 is about 73.5475189038.

It can be divided in two parts, 39 and 7836, that added together give a triangular number (7875 = T₁₂₅).

The spelling of 397836 in words is "three hundred ninety-seven thousand, eight hundred thirty-six".