1019489856 has 168 divisors, whose sum is σ = 3389010240. Its totient is φ = 264760320.

The previous prime is 1019489837. The next prime is 1019489873. The reversal of 1019489856 is 6589849101.

It is a tau number, because it is divible by the number of its divisors (168).

It is a junction number, because it is equal to n+sod(n) for n = 1019489799 and 1019489808.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 159490 + ... + 165758.

It is an arithmetic number, because the mean of its divisors is an integer number (20172680).

Almost surely, 2^1019489856 is an apocalyptic number.

1019489856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1019489856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1694505120).

1019489856 is an abundant number, since it is smaller than the sum of its proper divisors (2369520384).

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

1019489856 is a wasteful number, since it uses less digits than its factorization.

1019489856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6313 (or 6292 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 51.

The square root of 1019489856 is about 31929.4512323654. The cubic root of 1019489856 is about 1006.4548637527.

The spelling of 1019489856 in words is "one billion, nineteen million, four hundred eighty-nine thousand, eight hundred fifty-six".