130669728 has 96 divisors (see below), whose sum is σ = 393853824. Its totient is φ = 37158912.

The previous prime is 130669727. The next prime is 130669741. The reversal of 130669728 is 827966031.

It is a happy number.

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

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 130669728.

It is not an unprimeable number, because it can be changed into a prime (130669727) 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, 226176 + ... + 226752.

It is an arithmetic number, because the mean of its divisors is an integer number (4102644).

Almost surely, 2^130669728 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 130669728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196926912).

130669728 is an abundant number, since it is smaller than the sum of its proper divisors (263184096).

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

130669728 is a wasteful number, since it uses less digits than its factorization.

130669728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934 (or 926 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 130669728 is about 11431.0860376431. The cubic root of 130669728 is about 507.4481369344.

The spelling of 130669728 in words is "one hundred thirty million, six hundred sixty-nine thousand, seven hundred twenty-eight".