1578779804 has 18 divisors (see below), whose sum is σ = 3213945000. Its totient is φ = 676619832.

The previous prime is 1578779803. The next prime is 1578779809. The reversal of 1578779804 is 4089778751.

It is a self number, because there is not a number n which added to its sum of digits gives 1578779804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1578779803) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4027304 + ... + 4027695.

It is an arithmetic number, because the mean of its divisors is an integer number (178552500).

Almost surely, 2^1578779804 is an apocalyptic number.

1578779804 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1578779804 is an abundant number, since it is smaller than the sum of its proper divisors (1635165196).

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

1578779804 is a wasteful number, since it uses less digits than its factorization.

1578779804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8055017 (or 8055008 counting only the distinct ones).

The product of its (nonzero) digits is 3951360, while the sum is 56.

The square root of 1578779804 is about 39733.8621832814. The cubic root of 1578779804 is about 1164.4133806098.

The spelling of 1578779804 in words is "one billion, five hundred seventy-eight million, seven hundred seventy-nine thousand, eight hundred four".