1429728 has 48 divisors (see below), whose sum is σ = 3837456. Its totient is φ = 465920.

The previous prime is 1429721. The next prime is 1429733. The reversal of 1429728 is 8279241.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1429721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4948 + ... + 5228.

It is an arithmetic number, because the mean of its divisors is an integer number (79947).

2^1429728 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 1429728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1918728).

1429728 is an abundant number, since it is smaller than the sum of its proper divisors (2407728).

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

1429728 is a wasteful number, since it uses less digits than its factorization.

1429728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347 (or 339 counting only the distinct ones).

The product of its digits is 8064, while the sum is 33.

The square root of 1429728 is about 1195.7123399882. The cubic root of 1429728 is about 112.6551735219.

It can be divided in two parts, 142 and 9728, that added together give a triangular number (9870 = T₁₄₀).

The spelling of 1429728 in words is "one million, four hundred twenty-nine thousand, seven hundred twenty-eight".