1428009823 has 8 divisors (see below), whose sum is σ = 1476579456. Its totient is φ = 1379596800.

The previous prime is 1428009797. The next prime is 1428009827. The reversal of 1428009823 is 3289008241.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1428009823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428009827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20458 + ... + 57223.

It is an arithmetic number, because the mean of its divisors is an integer number (184572432).

Almost surely, 2^1428009823 is an apocalyptic number.

1428009823 is a deficient number, since it is larger than the sum of its proper divisors (48569633).

1428009823 is an equidigital number, since it uses as much as digits as its factorization.

1428009823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78305.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 1428009823 is about 37789.0172272315. The cubic root of 1428009823 is about 1126.1002761133.

The spelling of 1428009823 in words is "one billion, four hundred twenty-eight million, nine thousand, eight hundred twenty-three".