1394147328 has 136 divisors (see below), whose sum is σ = 4252991808. Its totient is φ = 397934592.

The previous prime is 1394147327. The next prime is 1394147347. The reversal of 1394147328 is 8237414931.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 1394147328.

It is not an unprimeable number, because it can be changed into a prime (1394147327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1375750 + ... + 1376762.

Almost surely, 2^1394147328 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 1394147328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2126495904).

1394147328 is an abundant number, since it is smaller than the sum of its proper divisors (2858844480).

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

1394147328 is an frugal number, since it uses more digits than its factorization.

1394147328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1055 (or 1025 counting only the distinct ones).

The product of its digits is 145152, while the sum is 42.

The square root of 1394147328 is about 37338.2823386401. The cubic root of 1394147328 is about 1117.1278791426.

The spelling of 1394147328 in words is "one billion, three hundred ninety-four million, one hundred forty-seven thousand, three hundred twenty-eight".