1071728 has 30 divisors (see below), whose sum is σ = 2417256. Its totient is φ = 458976.

The previous prime is 1071703. The next prime is 1071739. The reversal of 1071728 is 8271701.

It is a super-2 number, since 2×1071728² = 2297201811968, which contains 22 as substring.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1071697 and 1071706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 101 + ... + 1467.

2^1071728 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 1071728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1208628).

1071728 is an abundant number, since it is smaller than the sum of its proper divisors (1345528).

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

1071728 is a wasteful number, since it uses less digits than its factorization.

1071728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1389 (or 1376 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 26.

The square root of 1071728 is about 1035.2429666508. The cubic root of 1071728 is about 102.3359421952.

The spelling of 1071728 in words is "one million, seventy-one thousand, seven hundred twenty-eight".