387684225 has 30 divisors (see below), whose sum is σ = 718128950. Its totient is φ = 206763840.

The previous prime is 387684191. The next prime is 387684229. The reversal of 387684225 is 522486783.

It can be written as a sum of positive squares in 3 ways, for example, as 1679616 + 386004609 = 1296^2 + 19647^2 .

It is not a de Polignac number, because 387684225 - 2⁶ = 387684161 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387684229) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 93700 + ... + 97749.

Almost surely, 2^387684225 is an apocalyptic number.

It is an amenable number.

387684225 is a deficient number, since it is larger than the sum of its proper divisors (330444725).

387684225 is a wasteful number, since it uses less digits than its factorization.

387684225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191471 (or 191457 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The square root of 387684225 is about 19689.6984486812. The cubic root of 387684225 is about 729.1653844150.

The spelling of 387684225 in words is "three hundred eighty-seven million, six hundred eighty-four thousand, two hundred twenty-five".