3992220 has 48 divisors (see below), whose sum is σ = 12421920. Its totient is φ = 1064448.

The previous prime is 3992213. The next prime is 3992221. The reversal of 3992220 is 222993.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3992221) 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 15 ways as a sum of consecutive naturals, for example, 3157 + ... + 4236.

It is an arithmetic number, because the mean of its divisors is an integer number (258790).

Almost surely, 2^3992220 is an apocalyptic number.

3992220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3992220 is an abundant number, since it is smaller than the sum of its proper divisors (8429700).

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

3992220 is a wasteful number, since it uses less digits than its factorization.

3992220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7411 (or 7403 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 3992220 is about 1998.0540533229. The cubic root of 3992220 is about 158.6371218989.

The spelling of 3992220 in words is "three million, nine hundred ninety-two thousand, two hundred twenty".