396645744 has 120 divisors (see below), whose sum is σ = 1163147776. Its totient is φ = 116265600.

The previous prime is 396645671. The next prime is 396645749. The reversal of 396645744 is 447546693.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 396645693 and 396645702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (396645749) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 178947 + ... + 181149.

Almost surely, 2^396645744 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 396645744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (581573888).

396645744 is an abundant number, since it is smaller than the sum of its proper divisors (766502032).

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

396645744 is a wasteful number, since it uses less digits than its factorization.

396645744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2267 (or 2250 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 48.

The square root of 396645744 is about 19915.9670616317. The cubic root of 396645744 is about 734.7409851369.

The spelling of 396645744 in words is "three hundred ninety-six million, six hundred forty-five thousand, seven hundred forty-four".