3902220 has 144 divisors (see below), whose sum is σ = 14327040. Its totient is φ = 839808.

The previous prime is 3902219. The next prime is 3902237. The reversal of 3902220 is 222093.

3902220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 3902193 and 3902202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23859 + ... + 24021.

Almost surely, 2^3902220 is an apocalyptic number.

3902220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3902220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7163520).

3902220 is an abundant number, since it is smaller than the sum of its proper divisors (10424820).

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

3902220 is a wasteful number, since it uses less digits than its factorization.

3902220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204 (or 199 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 3902220 is about 1975.4037561977. The cubic root of 3902220 is about 157.4359527948.

The spelling of 3902220 in words is "three million, nine hundred two thousand, two hundred twenty".