2023866 has 60 divisors (see below), whose sum is σ = 5046426. Its totient is φ = 602640.

The previous prime is 2023859. The next prime is 2023891. The reversal of 2023866 is 6683202.

It can be written as a sum of positive squares in only one way, i.e., 1946025 + 77841 = 1395^2 + 279^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

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 29 ways as a sum of consecutive naturals, for example, 65271 + ... + 65301.

2^2023866 is an apocalyptic number.

2023866 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 2023866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2523213).

2023866 is an abundant number, since it is smaller than the sum of its proper divisors (3022560).

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

2023866 is a wasteful number, since it uses less digits than its factorization.

2023866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89 (or 49 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 2023866 is about 1422.6264442924. The cubic root of 2023866 is about 126.4912792709.

The spelling of 2023866 in words is "two million, twenty-three thousand, eight hundred sixty-six".