387505055 has 32 divisors (see below), whose sum is σ = 568249344. Its totient is φ = 247620096.

The previous prime is 387505051. The next prime is 387505061. The reversal of 387505055 is 550505783.

It is not a de Polignac number, because 387505055 - 2² = 387505051 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387505051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 58124 + ... + 64446.

It is an arithmetic number, because the mean of its divisors is an integer number (17757792).

Almost surely, 2^387505055 is an apocalyptic number.

387505055 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

387505055 is a deficient number, since it is larger than the sum of its proper divisors (180744289).

387505055 is a wasteful number, since it uses less digits than its factorization.

387505055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6455.

The product of its (nonzero) digits is 105000, while the sum is 38.

The square root of 387505055 is about 19685.1480817392. The cubic root of 387505055 is about 729.0530380906.

The spelling of 387505055 in words is "three hundred eighty-seven million, five hundred five thousand, fifty-five".