1428803780 has 12 divisors (see below), whose sum is σ = 3000487980. Its totient is φ = 571521504.

The previous prime is 1428803771. The next prime is 1428803801. The reversal of 1428803780 is 873088241.

1428803780 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 487173184 + 941630596 = 22072^2 + 30686^2 .

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

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 3 ways as a sum of consecutive naturals, for example, 35720075 + ... + 35720114.

It is an arithmetic number, because the mean of its divisors is an integer number (250040665).

Almost surely, 2^1428803780 is an apocalyptic number.

1428803780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1428803780 is an abundant number, since it is smaller than the sum of its proper divisors (1571684200).

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

1428803780 is a wasteful number, since it uses less digits than its factorization.

1428803780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71440198 (or 71440196 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 41.

The square root of 1428803780 is about 37799.5208964347. The cubic root of 1428803780 is about 1126.3089370378.

The spelling of 1428803780 in words is "one billion, four hundred twenty-eight million, eight hundred three thousand, seven hundred eighty".