3900420 has 96 divisors (see below), whose sum is σ = 12579840. Its totient is φ = 1002240.

The previous prime is 3900397. The next prime is 3900433. The reversal of 3900420 is 240093.

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

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 3900393 and 3900402.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16624 + ... + 16856.

It is an arithmetic number, because the mean of its divisors is an integer number (131040).

Almost surely, 2^3900420 is an apocalyptic number.

3900420 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 3900420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6289920).

3900420 is an abundant number, since it is smaller than the sum of its proper divisors (8679420).

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

3900420 is a wasteful number, since it uses less digits than its factorization.

3900420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282 (or 274 counting only the distinct ones).

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

The square root of 3900420 is about 1974.9481005839. The cubic root of 3900420 is about 157.4117419354.

The spelling of 3900420 in words is "three million, nine hundred thousand, four hundred twenty".