387172485 has 72 divisors (see below), whose sum is σ = 793128960. Its totient is φ = 171149760.

The previous prime is 387172483. The next prime is 387172523. The reversal of 387172485 is 584271783.

387172485 is a `hidden beast` number, since 38 + 71 + 72 + 485 = 666.

It is not a de Polignac number, because 387172485 - 2¹ = 387172483 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 387172485.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387172483) by changing a digit.

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 71 ways as a sum of consecutive naturals, for example, 302076 + ... + 303354.

It is an arithmetic number, because the mean of its divisors is an integer number (11015680).

Almost surely, 2^387172485 is an apocalyptic number.

387172485 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

387172485 is an abundant number, since it is smaller than the sum of its proper divisors (405956475).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

387172485 is a wasteful number, since it uses less digits than its factorization.

387172485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1359 (or 1325 counting only the distinct ones).

The product of its digits is 376320, while the sum is 45.

The square root of 387172485 is about 19676.6990371861. The cubic root of 387172485 is about 728.8444123694.

The spelling of 387172485 in words is "three hundred eighty-seven million, one hundred seventy-two thousand, four hundred eighty-five".