1375728 has 20 divisors (see below), whose sum is σ = 3554088. Its totient is φ = 458560.

The previous prime is 1375727. The next prime is 1375729. The reversal of 1375728 is 8275731.

It is an interprime number because it is at equal distance from previous prime (1375727) and next prime (1375729).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1375723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14283 + ... + 14378.

2^1375728 is an apocalyptic number.

It is an amenable number.

1375728 is an abundant number, since it is smaller than the sum of its proper divisors (2178360).

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

1375728 is a wasteful number, since it uses less digits than its factorization.

1375728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28672 (or 28666 counting only the distinct ones).

The product of its digits is 11760, while the sum is 33.

The square root of 1375728 is about 1172.9143191214. The cubic root of 1375728 is about 111.2186260054.

The spelling of 1375728 in words is "one million, three hundred seventy-five thousand, seven hundred twenty-eight".