386449369920 has 84 divisors (see below), whose sum is σ = 1329224821860. Its totient is φ = 103053164544.

The previous prime is 386449369829. The next prime is 386449369921. The reversal of 386449369920 is 29963944683.

386449369920 is a `hidden beast` number, since 3 + 8 + 64 + 493 + 69 + 9 + 20 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 197370501696 + 189078868224 = 444264^2 + 434832^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (386449369921) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67089025 + ... + 67094784.

Almost surely, 2^386449369920 is an apocalyptic number.

386449369920 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

386449369920 is an abundant number, since it is smaller than the sum of its proper divisors (942775451940).

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

386449369920 is a wasteful number, since it uses less digits than its factorization.

386449369920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134183832 (or 134183819 counting only the distinct ones).

The product of its (nonzero) digits is 60466176, while the sum is 63.

The spelling of 386449369920 in words is "three hundred eighty-six billion, four hundred forty-nine million, three hundred sixty-nine thousand, nine hundred twenty".