1578460849 has 4 divisors (see below), whose sum is σ = 1803955264. Its totient is φ = 1352966436.

The previous prime is 1578460841. The next prime is 1578460861. The reversal of 1578460849 is 9480648751.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9480648751 = 7 ⋅1354378393.

It is a cyclic number.

It is not a de Polignac number, because 1578460849 - 2³ = 1578460841 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1578460796 and 1578460805.

It is not an unprimeable number, because it can be changed into a prime (1578460841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112747197 + ... + 112747210.

It is an arithmetic number, because the mean of its divisors is an integer number (450988816).

Almost surely, 2^1578460849 is an apocalyptic number.

It is an amenable number.

1578460849 is a deficient number, since it is larger than the sum of its proper divisors (225494415).

1578460849 is an equidigital number, since it uses as much as digits as its factorization.

1578460849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225494414.

The product of its (nonzero) digits is 1935360, while the sum is 52.

The square root of 1578460849 is about 39729.8483384973. The cubic root of 1578460849 is about 1164.3349612967.

The spelling of 1578460849 in words is "one billion, five hundred seventy-eight million, four hundred sixty thousand, eight hundred forty-nine".