1409569728 has 112 divisors (see below), whose sum is σ = 4271491584. Its totient is φ = 401863680.

The previous prime is 1409569727. The next prime is 1409569753. The reversal of 1409569728 is 8279659041.

It is a tau number, because it is divible by the number of its divisors (112).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1409569727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 868758 + ... + 870378.

Almost surely, 2^1409569728 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 1409569728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2135745792).

1409569728 is an abundant number, since it is smaller than the sum of its proper divisors (2861921856).

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

1409569728 is a wasteful number, since it uses less digits than its factorization.

1409569728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2290 (or 2280 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 51.

The square root of 1409569728 is about 37544.2369478992. The cubic root of 1409569728 is about 1121.2320964717.

The spelling of 1409569728 in words is "one billion, four hundred nine million, five hundred sixty-nine thousand, seven hundred twenty-eight".