396509844 has 12 divisors (see below), whose sum is σ = 925189664. Its totient is φ = 132169944.

The previous prime is 396509831. The next prime is 396509851. The reversal of 396509844 is 448905693.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 396509793 and 396509802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16521232 + ... + 16521255.

Almost surely, 2^396509844 is an apocalyptic number.

It is an amenable number.

396509844 is an abundant number, since it is smaller than the sum of its proper divisors (528679820).

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

396509844 is a wasteful number, since it uses less digits than its factorization.

396509844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33042494 (or 33042492 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 48.

The square root of 396509844 is about 19912.5549340109. The cubic root of 396509844 is about 734.6570624701.

It can be divided in two parts, 39650 and 9844, that added together give a palindrome (49494).

The spelling of 396509844 in words is "three hundred ninety-six million, five hundred nine thousand, eight hundred forty-four".