1428841220 has 24 divisors (see below), whose sum is σ = 3003091224. Its totient is φ = 571055616.

The previous prime is 1428841217. The next prime is 1428841231. The reversal of 1428841220 is 221488241.

It can be written as a sum of positive squares in 4 ways, for example, as 41576704 + 1387264516 = 6448^2 + 37246^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5189 + ... + 53708.

It is an arithmetic number, because the mean of its divisors is an integer number (125128801).

Almost surely, 2^1428841220 is an apocalyptic number.

1428841220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1428841220 is an abundant number, since it is smaller than the sum of its proper divisors (1574250004).

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

1428841220 is a wasteful number, since it uses less digits than its factorization.

1428841220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60119 (or 60117 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 32.

The square root of 1428841220 is about 37800.0161375627. The cubic root of 1428841220 is about 1126.3187747866.

The spelling of 1428841220 in words is "one billion, four hundred twenty-eight million, eight hundred forty-one thousand, two hundred twenty".