1086391820 has 12 divisors (see below), whose sum is σ = 2281422864. Its totient is φ = 434556720.

The previous prime is 1086391811. The next prime is 1086391841. The reversal of 1086391820 is 281936801.

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, 27159776 + ... + 27159815.

It is an arithmetic number, because the mean of its divisors is an integer number (190118572).

Almost surely, 2^1086391820 is an apocalyptic number.

1086391820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1086391820 is an abundant number, since it is smaller than the sum of its proper divisors (1195031044).

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

1086391820 is a wasteful number, since it uses less digits than its factorization.

1086391820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54319600 (or 54319598 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 1086391820 is about 32960.4584312779. The cubic root of 1086391820 is about 1028.0056359363.

The spelling of 1086391820 in words is "one billion, eighty-six million, three hundred ninety-one thousand, eight hundred twenty".