1086399828 has 18 divisors (see below), whose sum is σ = 2746177434. Its totient is φ = 362133264.

The previous prime is 1086399823. The next prime is 1086399889. The reversal of 1086399828 is 8289936801.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1058331024 + 28068804 = 32532^2 + 5298^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1086399823) 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, 15088851 + ... + 15088922.

It is an arithmetic number, because the mean of its divisors is an integer number (152565413).

Almost surely, 2^1086399828 is an apocalyptic number.

1086399828 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1086399828 is an abundant number, since it is smaller than the sum of its proper divisors (1659777606).

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

1086399828 is a wasteful number, since it uses less digits than its factorization.

1086399828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30177783 (or 30177778 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 54.

The square root of 1086399828 is about 32960.5799099470. The cubic root of 1086399828 is about 1028.0081618049.

It can be divided in two parts, 108 and 6399828, that added together give a palindrome (6399936).

The spelling of 1086399828 in words is "one billion, eighty-six million, three hundred ninety-nine thousand, eight hundred twenty-eight".