1330428 has 24 divisors (see below), whose sum is σ = 3386880. Its totient is φ = 403120.

The previous prime is 1330423. The next prime is 1330453. The reversal of 1330428 is 8240331.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1330423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4908 + ... + 5171.

It is an arithmetic number, because the mean of its divisors is an integer number (141120).

2^1330428 is an apocalyptic number.

It is an amenable number.

1330428 is an abundant number, since it is smaller than the sum of its proper divisors (2056452).

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

1330428 is a wasteful number, since it uses less digits than its factorization.

1330428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10097 (or 10095 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1330428 is about 1153.4418060743. The cubic root of 1330428 is about 109.9842401664.

Adding to 1330428 its reverse (8240331), we get a palindrome (9570759).

Subtracting 1330428 from its reverse (8240331), we obtain a triangular number (6909903 = T₃₇₁₇).

The spelling of 1330428 in words is "one million, three hundred thirty thousand, four hundred twenty-eight".