386172220 has 24 divisors (see below), whose sum is σ = 926813664. Its totient is φ = 132401856.

The previous prime is 386172211. The next prime is 386172247. The reversal of 386172220 is 22271683.

It is a congruent number.

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, 1379047 + ... + 1379326.

It is an arithmetic number, because the mean of its divisors is an integer number (38617236).

Almost surely, 2^386172220 is an apocalyptic number.

It is an amenable number.

386172220 is an abundant number, since it is smaller than the sum of its proper divisors (540641444).

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

386172220 is a wasteful number, since it uses less digits than its factorization.

386172220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2758389 (or 2758387 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 386172220 is about 19651.2650992245. The cubic root of 386172220 is about 728.2162114916.

The spelling of 386172220 in words is "three hundred eighty-six million, one hundred seventy-two thousand, two hundred twenty".