1428530820 has 24 divisors (see below), whose sum is σ = 3999886464. Its totient is φ = 380941536.

The previous prime is 1428530813. The next prime is 1428530839. The reversal of 1428530820 is 280358241.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11904364 + ... + 11904483.

It is an arithmetic number, because the mean of its divisors is an integer number (166661936).

Almost surely, 2^1428530820 is an apocalyptic number.

1428530820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1428530820 is an abundant number, since it is smaller than the sum of its proper divisors (2571355644).

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

1428530820 is a wasteful number, since it uses less digits than its factorization.

1428530820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23808859 (or 23808857 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 1428530820 is about 37795.9100961996. The cubic root of 1428530820 is about 1126.2372087684.

The spelling of 1428530820 in words is "one billion, four hundred twenty-eight million, five hundred thirty thousand, eight hundred twenty".