1428184872 has 48 divisors (see below), whose sum is σ = 4011265440. Its totient is φ = 476060976.

The previous prime is 1428184847. The next prime is 1428184889. The reversal of 1428184872 is 2784818241.

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 11 ways as a sum of consecutive naturals, for example, 365388 + ... + 369275.

It is an arithmetic number, because the mean of its divisors is an integer number (83568030).

Almost surely, 2^1428184872 is an apocalyptic number.

1428184872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1428184872 is an abundant number, since it is smaller than the sum of its proper divisors (2583080568).

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

1428184872 is an equidigital number, since it uses as much as digits as its factorization.

1428184872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734684 (or 734668 counting only the distinct ones).

The product of its digits is 229376, while the sum is 45.

The square root of 1428184872 is about 37791.3332921716. Note that the first 3 decimals coincide. The cubic root of 1428184872 is about 1126.1462876252.

The spelling of 1428184872 in words is "one billion, four hundred twenty-eight million, one hundred eighty-four thousand, eight hundred seventy-two".