1333820 has 24 divisors (see below), whose sum is σ = 2966544. Its totient is φ = 502016.

The previous prime is 1333811. The next prime is 1333831. The reversal of 1333820 is 283331.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1333792 and 1333801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1622 + ... + 2301.

It is an arithmetic number, because the mean of its divisors is an integer number (123606).

2^1333820 is an apocalyptic number.

1333820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1333820 is an abundant number, since it is smaller than the sum of its proper divisors (1632724).

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

1333820 is a wasteful number, since it uses less digits than its factorization.

1333820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3949 (or 3947 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1333820 is about 1154.9112520016. The cubic root of 1333820 is about 110.0776311503.

It can be divided in two parts, 13 and 33820, that added together give a palindrome (33833).

The spelling of 1333820 in words is "one million, three hundred thirty-three thousand, eight hundred twenty".