386394640380 has 432 divisors, whose sum is σ = 1421480686080. Its totient is φ = 82994554368.

The previous prime is 386394640339. The next prime is 386394640403. The reversal of 386394640380 is 83046493683.

It is a super-2 number, since 2×386394640380² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 531491577 + ... + 531492303.

Almost surely, 2^386394640380 is an apocalyptic number.

386394640380 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 386394640380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (710740343040).

386394640380 is an abundant number, since it is smaller than the sum of its proper divisors (1035086045700).

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

386394640380 is a wasteful number, since it uses less digits than its factorization.

386394640380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1066 (or 912 counting only the distinct ones).

The product of its (nonzero) digits is 8957952, while the sum is 54.

The spelling of 386394640380 in words is "three hundred eighty-six billion, three hundred ninety-four million, six hundred forty thousand, three hundred eighty".