1428888881 has 4 divisors (see below), whose sum is σ = 1633015872. Its totient is φ = 1224761892.

The previous prime is 1428888847. The next prime is 1428888941. The reversal of 1428888881 is 1888888241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1428888881 - 2³⁰ = 355147057 is a prime.

It is a super-2 number, since 2×1428888881² = 4083446868490864322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1428884881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102063485 + ... + 102063498.

It is an arithmetic number, because the mean of its divisors is an integer number (408253968).

Almost surely, 2^1428888881 is an apocalyptic number.

It is an amenable number.

1428888881 is a deficient number, since it is larger than the sum of its proper divisors (204126991).

1428888881 is an equidigital number, since it uses as much as digits as its factorization.

1428888881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204126990.

The product of its digits is 2097152, while the sum is 56.

The square root of 1428888881 is about 37800.6465685443. The cubic root of 1428888881 is about 1126.3312979608.

The spelling of 1428888881 in words is "one billion, four hundred twenty-eight million, eight hundred eighty-eight thousand, eight hundred eighty-one".