387816245 has 6 divisors (see below), whose sum is σ = 465432342. Its totient is φ = 310217768.

The previous prime is 387816227. The next prime is 387816281. The reversal of 387816245 is 542618783.

It can be written as a sum of positive squares in only one way, i.e., 310252996 + 77563249 = 17614^2 + 8807^2 .

It is not a de Polignac number, because 387816245 - 2⁶ = 387816181 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 387816196 and 387816205.

It is a congruent number.

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, 39632 + ... + 48438.

It is an arithmetic number, because the mean of its divisors is an integer number (77572057).

Almost surely, 2^387816245 is an apocalyptic number.

It is an amenable number.

387816245 is a deficient number, since it is larger than the sum of its proper divisors (77616097).

387816245 is an frugal number, since it uses more digits than its factorization.

387816245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17619 (or 8812 counting only the distinct ones).

The product of its digits is 322560, while the sum is 44.

The square root of 387816245 is about 19693.0506778406. The cubic root of 387816245 is about 729.2481437698.

The spelling of 387816245 in words is "three hundred eighty-seven million, eight hundred sixteen thousand, two hundred forty-five".