387432647 has 16 divisors (see below), whose sum is σ = 448611072. Its totient is φ = 327732480.

The previous prime is 387432607. The next prime is 387432653. The reversal of 387432647 is 746234783.

It is a cyclic number.

It is not a de Polignac number, because 387432647 - 2⁶ = 387432583 is a prime.

It is a super-2 number, since 2×387432647² = 300208111922853218, which contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 387432598 and 387432607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387432607) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 354572 + ... + 355662.

It is an arithmetic number, because the mean of its divisors is an integer number (28038192).

Almost surely, 2^387432647 is an apocalyptic number.

387432647 is a deficient number, since it is larger than the sum of its proper divisors (61178425).

387432647 is a wasteful number, since it uses less digits than its factorization.

387432647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1718.

The product of its digits is 677376, while the sum is 44.

The square root of 387432647 is about 19683.3088427734. The cubic root of 387432647 is about 729.0076257275.

The spelling of 387432647 in words is "three hundred eighty-seven million, four hundred thirty-two thousand, six hundred forty-seven".