396540 has 36 divisors (see below), whose sum is σ = 1203384. Its totient is φ = 105696.

The previous prime is 396533. The next prime is 396541. The reversal of 396540 is 45693.

It is a happy number.

396540 is a `hidden beast` number, since 3 + 9 + 654 + 0 = 666.

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

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (396541) by changing a digit.

396540 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, 922 + ... + 1281.

2³⁹⁶⁵⁴⁰ is an apocalyptic number.

396540 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

396540 is an abundant number, since it is smaller than the sum of its proper divisors (806844).

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

396540 is a wasteful number, since it uses less digits than its factorization.

396540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2218 (or 2213 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 396540 is about 629.7142208971. The cubic root of 396540 is about 73.4675686435.

It can be divided in two parts, 3965 and 40, that added together give a triangular number (4005 = T₈₉).

The spelling of 396540 in words is "three hundred ninety-six thousand, five hundred forty".