1428885897 has 4 divisors (see below), whose sum is σ = 1905181200. Its totient is φ = 952590596.

The previous prime is 1428885889. The next prime is 1428885907. The reversal of 1428885897 is 7985888241.

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 1428885897 - 2³ = 1428885889 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1428885897.

It is not an unprimeable number, because it can be changed into a prime (1428885827) by changing a digit.

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, 238147647 + ... + 238147652.

It is an arithmetic number, because the mean of its divisors is an integer number (476295300).

Almost surely, 2^1428885897 is an apocalyptic number.

It is an amenable number.

1428885897 is a deficient number, since it is larger than the sum of its proper divisors (476295303).

1428885897 is an equidigital number, since it uses as much as digits as its factorization.

1428885897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476295302.

The product of its digits is 10321920, while the sum is 60.

The square root of 1428885897 is about 37800.6070982994. The cubic root of 1428885897 is about 1126.3305139075.

It can be divided in two parts, 142888 and 5897, that added together give a triangular number (148785 = T₅₄₅).

The spelling of 1428885897 in words is "one billion, four hundred twenty-eight million, eight hundred eighty-five thousand, eight hundred ninety-seven".