392161220 has 24 divisors (see below), whose sum is σ = 898406208. Its totient is φ = 142604000.

The previous prime is 392161213. The next prime is 392161243. The reversal of 392161220 is 22161293.

It is a self number, because there is not a number n which added to its sum of digits gives 392161220.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 891056 + ... + 891495.

It is an arithmetic number, because the mean of its divisors is an integer number (37433592).

Almost surely, 2^392161220 is an apocalyptic number.

It is an amenable number.

392161220 is an abundant number, since it is smaller than the sum of its proper divisors (506244988).

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

392161220 is a wasteful number, since it uses less digits than its factorization.

392161220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1782571 (or 1782569 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 392161220 is about 19803.0608745214. The cubic root of 392161220 is about 731.9614604412.

The spelling of 392161220 in words is "three hundred ninety-two million, one hundred sixty-one thousand, two hundred twenty".