387112005 has 54 divisors (see below), whose sum is σ = 782411526. Its totient is φ = 176543136.

The previous prime is 387112003. The next prime is 387112013. The reversal of 387112005 is 500211783.

It can be written as a sum of positive squares in only one way, i.e., 309689604 + 77422401 = 17598^2 + 8799^2 .

It is not a de Polignac number, because 387112005 - 2¹ = 387112003 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 387112005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387112001) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 923686 + ... + 924104.

Almost surely, 2^387112005 is an apocalyptic number.

387112005 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

387112005 is an abundant number, since it is smaller than the sum of its proper divisors (395299521).

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

387112005 is an equidigital number, since it uses as much as digits as its factorization.

387112005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863 (or 434 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 387112005 is about 19675.1621340206. The cubic root of 387112005 is about 728.8064595987.

Adding to 387112005 its reverse (500211783), we get a palindrome (887323788).

It can be divided in two parts, 3871 and 12005, that added together give a square (15876 = 126²).

The spelling of 387112005 in words is "three hundred eighty-seven million, one hundred twelve thousand, five".