387819225 has 24 divisors (see below), whose sum is σ = 712439520. Its totient is φ = 206836560.

The previous prime is 387819221. The next prime is 387819227. The reversal of 387819225 is 522918783.

It is a happy number.

It is not a de Polignac number, because 387819225 - 2² = 387819221 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (387819221) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 286599 + ... + 287948.

It is an arithmetic number, because the mean of its divisors is an integer number (29684980).

Almost surely, 2^387819225 is an apocalyptic number.

It is an amenable number.

387819225 is a deficient number, since it is larger than the sum of its proper divisors (324620295).

387819225 is a wasteful number, since it uses less digits than its factorization.

387819225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574566 (or 574555 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 387819225 is about 19693.1263389031. The cubic root of 387819225 is about 729.2500116251.

The spelling of 387819225 in words is "three hundred eighty-seven million, eight hundred nineteen thousand, two hundred twenty-five".