395782640 has 160 divisors (see below), whose sum is σ = 1044522432. Its totient is φ = 138240000.

The previous prime is 395782637. The next prime is 395782663. The reversal of 395782640 is 46287593.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 395782591 and 395782600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3918590 + ... + 3918690.

Almost surely, 2^395782640 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 395782640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (522261216).

395782640 is an abundant number, since it is smaller than the sum of its proper divisors (648739792).

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

395782640 is a wasteful number, since it uses less digits than its factorization.

395782640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259 (or 253 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 44.

The square root of 395782640 is about 19894.2866170165. The cubic root of 395782640 is about 734.2076642185.

The spelling of 395782640 in words is "three hundred ninety-five million, seven hundred eighty-two thousand, six hundred forty".