1020388686 has 32 divisors (see below), whose sum is σ = 2056713120. Its totient is φ = 337483776.

The previous prime is 1020388679. The next prime is 1020388697. The reversal of 1020388686 is 6868830201.

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 15 ways as a sum of consecutive naturals, for example, 539230 + ... + 541118.

It is an arithmetic number, because the mean of its divisors is an integer number (64272285).

Almost surely, 2^1020388686 is an apocalyptic number.

1020388686 is an abundant number, since it is smaller than the sum of its proper divisors (1036324434).

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

1020388686 is a wasteful number, since it uses less digits than its factorization.

1020388686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2548.

The product of its (nonzero) digits is 110592, while the sum is 42.

The square root of 1020388686 is about 31943.5233811175. The cubic root of 1020388686 is about 1006.7505561178.

It can be divided in two parts, 10203 and 88686, that added together give a palindrome (98889).

The spelling of 1020388686 in words is "one billion, twenty million, three hundred eighty-eight thousand, six hundred eighty-six".