1086385638 has 64 divisors (see below), whose sum is σ = 2480873472. Its totient is φ = 314720640.

The previous prime is 1086385633. The next prime is 1086385639. The reversal of 1086385638 is 8365836801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1086385633) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 83395 + ... + 95537.

It is an arithmetic number, because the mean of its divisors is an integer number (38763648).

Almost surely, 2^1086385638 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1086385638, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1240436736).

1086385638 is an abundant number, since it is smaller than the sum of its proper divisors (1394487834).

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

1086385638 is a wasteful number, since it uses less digits than its factorization.

1086385638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12229.

The product of its (nonzero) digits is 829440, while the sum is 48.

The square root of 1086385638 is about 32960.3646521091. The cubic root of 1086385638 is about 1028.0036860128.

The spelling of 1086385638 in words is "one billion, eighty-six million, three hundred eighty-five thousand, six hundred thirty-eight".