387218720 has 48 divisors (see below), whose sum is σ = 1045493568. Its totient is φ = 132760320.

The previous prime is 387218717. The next prime is 387218723. The reversal of 387218720 is 27812783.

It is an interprime number because it is at equal distance from previous prime (387218717) and next prime (387218723).

It is not an unprimeable number, because it can be changed into a prime (387218723) 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 7 ways as a sum of consecutive naturals, for example, 171746 + ... + 173985.

It is an arithmetic number, because the mean of its divisors is an integer number (21781116).

Almost surely, 2^387218720 is an apocalyptic number.

It is an amenable number.

387218720 is an abundant number, since it is smaller than the sum of its proper divisors (658274848).

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

387218720 is a wasteful number, since it uses less digits than its factorization.

387218720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345753 (or 345745 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 38.

The square root of 387218720 is about 19677.8738688914. The cubic root of 387218720 is about 728.8734233670.

The spelling of 387218720 in words is "three hundred eighty-seven million, two hundred eighteen thousand, seven hundred twenty".