387649785 has 16 divisors (see below), whose sum is σ = 620657856. Its totient is φ = 206607168.

The previous prime is 387649771. The next prime is 387649807. The reversal of 387649785 is 587946783.

It is not a de Polignac number, because 387649785 - 2⁵ = 387649753 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16662 + ... + 32448.

It is an arithmetic number, because the mean of its divisors is an integer number (38791116).

Almost surely, 2^387649785 is an apocalyptic number.

It is an amenable number.

387649785 is a deficient number, since it is larger than the sum of its proper divisors (233008071).

387649785 is a wasteful number, since it uses less digits than its factorization.

387649785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17432.

The product of its digits is 10160640, while the sum is 57.

The square root of 387649785 is about 19688.8238602513. The cubic root of 387649785 is about 729.1437919282.

The spelling of 387649785 in words is "three hundred eighty-seven million, six hundred forty-nine thousand, seven hundred eighty-five".