1081369856 has 36 divisors (see below), whose sum is σ = 2466879072. Its totient is φ = 463443456.

The previous prime is 1081369837. The next prime is 1081369867. The reversal of 1081369856 is 6589631801.

It is a self number, because there is not a number n which added to its sum of digits gives 1081369856.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 299930 + ... + 303513.

Almost surely, 2^1081369856 is an apocalyptic number.

1081369856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1081369856 is an abundant number, since it is smaller than the sum of its proper divisors (1385509216).

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

1081369856 is an frugal number, since it uses more digits than its factorization.

1081369856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603466 (or 603452 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 47.

The square root of 1081369856 is about 32884.1885409995. The cubic root of 1081369856 is about 1026.4191663660.

The spelling of 1081369856 in words is "one billion, eighty-one million, three hundred sixty-nine thousand, eight hundred fifty-six".