1270728 has 80 divisors (see below), whose sum is σ = 3724380. Its totient is φ = 404352.

The previous prime is 1270679. The next prime is 1270747. The reversal of 1270728 is 8270721.

It can be written as a sum of positive squares in 2 ways, for example, as 1127844 + 142884 = 1062^2 + 378^2 .

It is a super-2 number, since 2×1270728² = 3229499299968, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 23950 + ... + 24002.

2^1270728 is an apocalyptic number.

1270728 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 1270728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1862190).

1270728 is an abundant number, since it is smaller than the sum of its proper divisors (2453652).

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

1270728 is a wasteful number, since it uses less digits than its factorization.

1270728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108 (or 95 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 27.

The square root of 1270728 is about 1127.2657184533. The cubic root of 1270728 is about 108.3139015772.

The spelling of 1270728 in words is "one million, two hundred seventy thousand, seven hundred twenty-eight".