1581879904 has 48 divisors (see below), whose sum is σ = 3507065856. Its totient is φ = 695836800.

The previous prime is 1581879899. The next prime is 1581879911. The reversal of 1581879904 is 4099781851.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 61572 + ... + 83395.

It is an arithmetic number, because the mean of its divisors is an integer number (73063872).

Almost surely, 2^1581879904 is an apocalyptic number.

It is an amenable number.

1581879904 is an abundant number, since it is smaller than the sum of its proper divisors (1925185952).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1581879904 is a wasteful number, since it uses less digits than its factorization.

1581879904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145019 (or 145011 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 52.

The square root of 1581879904 is about 39772.8538578765. The cubic root of 1581879904 is about 1165.1750316323.

The spelling of 1581879904 in words is "one billion, five hundred eighty-one million, eight hundred seventy-nine thousand, nine hundred four".