387877220 has 24 divisors (see below), whose sum is σ = 834410808. Its totient is φ = 151366400.

The previous prime is 387877213. The next prime is 387877241. The reversal of 387877220 is 22778783.

It can be written as a sum of positive squares in 4 ways, for example, as 8952064 + 378925156 = 2992^2 + 19466^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235691 + ... + 237330.

It is an arithmetic number, because the mean of its divisors is an integer number (34767117).

Almost surely, 2^387877220 is an apocalyptic number.

It is an amenable number.

387877220 is an abundant number, since it is smaller than the sum of its proper divisors (446533588).

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

387877220 is a wasteful number, since it uses less digits than its factorization.

387877220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473071 (or 473069 counting only the distinct ones).

The product of its (nonzero) digits is 263424, while the sum is 44.

The square root of 387877220 is about 19694.5987519421. The cubic root of 387877220 is about 729.2863608171.

The spelling of 387877220 in words is "three hundred eighty-seven million, eight hundred seventy-seven thousand, two hundred twenty".