1652220 has 72 divisors (see below), whose sum is σ = 5123664. Its totient is φ = 430848.

The previous prime is 1652171. The next prime is 1652237. The reversal of 1652220 is 222561.

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 = 1652193 and 1652202.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 11992 + ... + 12128.

It is an arithmetic number, because the mean of its divisors is an integer number (71162).

2^1652220 is an apocalyptic number.

1652220 is a gapful number since it is divisible by the number (10) 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 1652220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2561832).

1652220 is an abundant number, since it is smaller than the sum of its proper divisors (3471444).

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

1652220 is a wasteful number, since it uses less digits than its factorization.

1652220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219 (or 214 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1652220 is about 1285.3871012267. The cubic root of 1652220 is about 118.2195472151.

Adding to 1652220 its reverse (222561), we get a palindrome (1874781).

The spelling of 1652220 in words is "one million, six hundred fifty-two thousand, two hundred twenty".