1578449056 has 24 divisors (see below), whose sum is σ = 3136088340. Its totient is φ = 781982208.

The previous prime is 1578449023. The next prime is 1578449057. The reversal of 1578449056 is 6509448751.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1465664656 + 112784400 = 38284^2 + 10620^2 .

It is a super-2 number, since 2×1578449056² = 4983002844774582272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1578449057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222781 + ... + 229756.

Almost surely, 2^1578449056 is an apocalyptic number.

1578449056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1578449056 is a deficient number, since it is larger than the sum of its proper divisors (1557639284).

1578449056 is a wasteful number, since it uses less digits than its factorization.

1578449056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452656 (or 452648 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 49.

The square root of 1578449056 is about 39729.6999233571. The cubic root of 1578449056 is about 1164.3320616289.

The spelling of 1578449056 in words is "one billion, five hundred seventy-eight million, four hundred forty-nine thousand, fifty-six".