387345906 has 12 divisors (see below), whose sum is σ = 839249502. Its totient is φ = 129115296.

The previous prime is 387345883. The next prime is 387345911. The reversal of 387345906 is 609543783.

It can be written as a sum of positive squares in only one way, i.e., 356643225 + 30702681 = 18885^2 + 5541^2 .

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 5 ways as a sum of consecutive naturals, for example, 10759591 + ... + 10759626.

Almost surely, 2^387345906 is an apocalyptic number.

387345906 is an abundant number, since it is smaller than the sum of its proper divisors (451903596).

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

387345906 is a wasteful number, since it uses less digits than its factorization.

387345906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21519225 (or 21519222 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The square root of 387345906 is about 19681.1053043268. The cubic root of 387345906 is about 728.9532166402.

The spelling of 387345906 in words is "three hundred eighty-seven million, three hundred forty-five thousand, nine hundred six".