386806284440 has 64 divisors (see below), whose sum is σ = 882597461760. Its totient is φ = 152546423680.

The previous prime is 386806284439. The next prime is 386806284451. The reversal of 386806284440 is 44482608683.

It is a super-2 number, since 2×386806284440² (a number of 24 digits) contains 22 as substring.

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, 1511477 + ... + 1748763.

It is an arithmetic number, because the mean of its divisors is an integer number (13790585340).

Almost surely, 2^386806284440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 386806284440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (441298730880).

386806284440 is an abundant number, since it is smaller than the sum of its proper divisors (495791177320).

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

386806284440 is a wasteful number, since it uses less digits than its factorization.

386806284440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237872 (or 237868 counting only the distinct ones).

The product of its (nonzero) digits is 7077888, while the sum is 53.

The spelling of 386806284440 in words is "three hundred eighty-six billion, eight hundred six million, two hundred eighty-four thousand, four hundred forty".