2163420 has 144 divisors (see below), whose sum is σ = 8019648. Its totient is φ = 460800.

The previous prime is 2163409. The next prime is 2163431. The reversal of 2163420 is 243612.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2163409) and next prime (2163431).

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

It is a d-powerful number, because it can be written as 2⁹ + 1 + 6³ + 3 + 4⁸ + 2²¹ + 0 .

It is a junction number, because it is equal to n+sod(n) for n = 2163393 and 2163402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21370 + ... + 21470.

It is an arithmetic number, because the mean of its divisors is an integer number (55692).

2^2163420 is an apocalyptic number.

2163420 is a gapful number since it is divisible by the number (20) 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 2163420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4009824).

2163420 is an abundant number, since it is smaller than the sum of its proper divisors (5856228).

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

2163420 is a wasteful number, since it uses less digits than its factorization.

2163420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 135 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 2163420 is about 1470.8568931069. The cubic root of 2163420 is about 129.3342691917.

It can be divided in two parts, 216 and 3420, that multiplied together give a triangular number (738720 = T₁₂₁₅).

The spelling of 2163420 in words is "two million, one hundred sixty-three thousand, four hundred twenty".