1023620 has 48 divisors (see below), whose sum is σ = 2408448. Its totient is φ = 362880.

The previous prime is 1023601. The next prime is 1023643. The reversal of 1023620 is 263201.

It is a junction number, because it is equal to n+sod(n) for n = 1023595 and 1023604.

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 15 ways as a sum of consecutive naturals, for example, 7997 + ... + 8123.

It is an arithmetic number, because the mean of its divisors is an integer number (50176).

2^1023620 is an apocalyptic number.

1023620 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 1023620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1204224).

1023620 is an abundant number, since it is smaller than the sum of its proper divisors (1384828).

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

1023620 is a wasteful number, since it uses less digits than its factorization.

1023620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180 (or 178 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1023620 is about 1011.7410735954. The cubic root of 1023620 is about 100.7812144803.

Adding to 1023620 its reverse (263201), we get a palindrome (1286821).

The spelling of 1023620 in words is "one million, twenty-three thousand, six hundred twenty".