395689320 has 128 divisors (see below), whose sum is σ = 1420473600. Its totient is φ = 97396992.

The previous prime is 395689313. The next prime is 395689321. The reversal of 395689320 is 23986593.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (395689321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52 + ... + 28131.

It is an arithmetic number, because the mean of its divisors is an integer number (11097450).

Almost surely, 2^395689320 is an apocalyptic number.

395689320 is a gapful number since it is divisible by the number (30) 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 395689320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (710236800).

395689320 is an abundant number, since it is smaller than the sum of its proper divisors (1024784280).

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

395689320 is a wasteful number, since it uses less digits than its factorization.

395689320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28216 (or 28206 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The square root of 395689320 is about 19891.9410817547. The cubic root of 395689320 is about 734.1499543898.

The spelling of 395689320 in words is "three hundred ninety-five million, six hundred eighty-nine thousand, three hundred twenty".