1928456479 has 4 divisors (see below), whose sum is σ = 1928544840. Its totient is φ = 1928368120.

The previous prime is 1928456473. The next prime is 1928456513. The reversal of 1928456479 is 9746548291.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9746548291 = 79 ⋅123374029.

It is a cyclic number.

It is not a de Polignac number, because 1928456479 - 2¹⁵ = 1928423711 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 (1928456473) 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 3 ways as a sum of consecutive naturals, for example, 14832 + ... + 63850.

It is an arithmetic number, because the mean of its divisors is an integer number (482136210).

Almost surely, 2^1928456479 is an apocalyptic number.

1928456479 is a deficient number, since it is larger than the sum of its proper divisors (88361).

1928456479 is an equidigital number, since it uses as much as digits as its factorization.

1928456479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88360.

The product of its digits is 4354560, while the sum is 55.

The square root of 1928456479 is about 43914.1945047384. The cubic root of 1928456479 is about 1244.7150692828.

The spelling of 1928456479 in words is "one billion, nine hundred twenty-eight million, four hundred fifty-six thousand, four hundred seventy-nine".