1578285990 has 96 divisors (see below), whose sum is σ = 4354871040. Its totient is φ = 395723328.

The previous prime is 1578285971. The next prime is 1578286007. The reversal of 1578285990 is 995828751.

It is a congruent number.

It is an unprimeable number.

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 in 47 ways as a sum of consecutive naturals, for example, 115669 + ... + 128591.

It is an arithmetic number, because the mean of its divisors is an integer number (45363240).

Almost surely, 2^1578285990 is an apocalyptic number.

1578285990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1578285990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2177435520).

1578285990 is an abundant number, since it is smaller than the sum of its proper divisors (2776585050).

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

1578285990 is a wasteful number, since it uses less digits than its factorization.

1578285990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13018 (or 13015 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 54.

The square root of 1578285990 is about 39727.6476776564. The cubic root of 1578285990 is about 1164.2919654113.

The spelling of 1578285990 in words is "one billion, five hundred seventy-eight million, two hundred eighty-five thousand, nine hundred ninety".