1428356481 has 8 divisors (see below), whose sum is σ = 1904741664. Its totient is φ = 952104480.

The previous prime is 1428356453. The next prime is 1428356491. The reversal of 1428356481 is 1846538241.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1428356481 - 2⁶ = 1428356417 is a prime.

It is a super-2 number, since 2×1428356481² = 4080404473629406722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1428356411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4780 + ... + 53661.

It is an arithmetic number, because the mean of its divisors is an integer number (238092708).

Almost surely, 2^1428356481 is an apocalyptic number.

It is an amenable number.

1428356481 is a deficient number, since it is larger than the sum of its proper divisors (476385183).

1428356481 is an equidigital number, since it uses as much as digits as its factorization.

1428356481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66591.

The product of its digits is 184320, while the sum is 42.

The square root of 1428356481 is about 37793.6037048599. The cubic root of 1428356481 is about 1126.1913912861.

The spelling of 1428356481 in words is "one billion, four hundred twenty-eight million, three hundred fifty-six thousand, four hundred eighty-one".