387961218 has 64 divisors (see below), whose sum is σ = 909066240. Its totient is φ = 122461200.

The previous prime is 387961213. The next prime is 387961261. The reversal of 387961218 is 812169783.

It is not an unprimeable number, because it can be changed into a prime (387961213) 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, 76213 + ... + 81143.

It is an arithmetic number, because the mean of its divisors is an integer number (14204160).

Almost surely, 2^387961218 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 387961218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (454533120).

387961218 is an abundant number, since it is smaller than the sum of its proper divisors (521105022).

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

387961218 is a wasteful number, since it uses less digits than its factorization.

387961218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5020 (or 5014 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 387961218 is about 19696.7311501173. The cubic root of 387961218 is about 729.3390013359.

The spelling of 387961218 in words is "three hundred eighty-seven million, nine hundred sixty-one thousand, two hundred eighteen".