2311020 has 72 divisors (see below), whose sum is σ = 7220304. Its totient is φ = 597888.

The previous prime is 2311013. The next prime is 2311021. The reversal of 2311020 is 201132.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a zygodrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 2310993 and 2311011.

It is not an unprimeable number, because it can be changed into a prime (2311021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6487 + ... + 6833.

It is an arithmetic number, because the mean of its divisors is an integer number (100282).

2^2311020 is an apocalyptic number.

2311020 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 2311020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3610152).

2311020 is an abundant number, since it is smaller than the sum of its proper divisors (4909284).

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

2311020 is a wasteful number, since it uses less digits than its factorization.

2311020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399 (or 394 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 2311020 is about 1520.2039336878. The cubic root of 2311020 is about 132.2110947437.

Adding to 2311020 its reverse (201132), we get a palindrome (2512152).

The spelling of 2311020 in words is "two million, three hundred eleven thousand, twenty".