1395644328 has 96 divisors (see below), whose sum is σ = 4079843040. Its totient is φ = 428457600.

The previous prime is 1395644303. The next prime is 1395644357. The reversal of 1395644328 is 8234465931.

1395644328 is a `hidden beast` number, since 139 + 56 + 443 + 28 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 488103 + ... + 490953.

It is an arithmetic number, because the mean of its divisors is an integer number (42498365).

Almost surely, 2^1395644328 is an apocalyptic number.

1395644328 is a gapful number since it is divisible by the number (18) 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 1395644328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2039921520).

1395644328 is an abundant number, since it is smaller than the sum of its proper divisors (2684198712).

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

1395644328 is a wasteful number, since it uses less digits than its factorization.

1395644328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3399 (or 3392 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The square root of 1395644328 is about 37358.3234099176. The cubic root of 1395644328 is about 1117.5275839625.

The spelling of 1395644328 in words is "one billion, three hundred ninety-five million, six hundred forty-four thousand, three hundred twenty-eight".