1369728 has 96 divisors (see below), whose sum is σ = 4176900. Its totient is φ = 430080.

The previous prime is 1369727. The next prime is 1369733. The reversal of 1369728 is 8279631.

It can be written as a sum of positive squares in 2 ways, for example, as 1272384 + 97344 = 1128^2 + 312^2 .

It is a tau number, because it is divible by the number of its divisors (96).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1369692 and 1369701.

It is not an unprimeable number, because it can be changed into a prime (1369723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33388 + ... + 33428.

2^1369728 is an apocalyptic number.

1369728 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 1369728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2088450).

1369728 is an abundant number, since it is smaller than the sum of its proper divisors (2807172).

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

1369728 is a wasteful number, since it uses less digits than its factorization.

1369728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90 (or 75 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 1369728 is about 1170.3537926627. The cubic root of 1369728 is about 111.0567034367.

Subtracting 1369728 from its reverse (8279631), we obtain a triangular number (6909903 = T₃₇₁₇).

The spelling of 1369728 in words is "one million, three hundred sixty-nine thousand, seven hundred twenty-eight".