1578458678 has 4 divisors (see below), whose sum is σ = 2367688020. Its totient is φ = 789229338.

The previous prime is 1578458677. The next prime is 1578458681. The reversal of 1578458678 is 8768548751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8768548751 = 1493 ⋅5873107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1578458671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 394614668 + ... + 394614671.

It is an arithmetic number, because the mean of its divisors is an integer number (591922005).

Almost surely, 2^1578458678 is an apocalyptic number.

1578458678 is a deficient number, since it is larger than the sum of its proper divisors (789229342).

1578458678 is an equidigital number, since it uses as much as digits as its factorization.

1578458678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789229341.

The product of its digits is 15052800, while the sum is 59.

The square root of 1578458678 is about 39729.8210164607. The cubic root of 1578458678 is about 1164.3344274914.

The spelling of 1578458678 in words is "one billion, five hundred seventy-eight million, four hundred fifty-eight thousand, six hundred seventy-eight".