387880965 has 24 divisors (see below), whose sum is σ = 672980568. Its totient is φ = 206668800.

The previous prime is 387880943. The next prime is 387880973. The reversal of 387880965 is 569088783.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 17164449 + 370716516 = 4143^2 + 19254^2 .

It is not a de Polignac number, because 387880965 - 2⁷ = 387880837 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50457 + ... + 57633.

It is an arithmetic number, because the mean of its divisors is an integer number (28040857).

Almost surely, 2^387880965 is an apocalyptic number.

It is an amenable number.

387880965 is a deficient number, since it is larger than the sum of its proper divisors (285099603).

387880965 is a wasteful number, since it uses less digits than its factorization.

387880965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8389 (or 8386 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The square root of 387880965 is about 19694.6938285417. The cubic root of 387880965 is about 729.2887079246.

The spelling of 387880965 in words is "three hundred eighty-seven million, eight hundred eighty thousand, nine hundred sixty-five".