303820 has 24 divisors (see below), whose sum is σ = 696528. Its totient is φ = 110400.

The previous prime is 303817. The next prime is 303827. The reversal of 303820 is 28303.

303820 = T₂₁₉ + T₂₂₀ + ... + T₂₃₀.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 303794 and 303803.

It is not an unprimeable number, because it can be changed into a prime (303827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 471 + ... + 910.

It is an arithmetic number, because the mean of its divisors is an integer number (29022).

2³⁰³⁸²⁰ is an apocalyptic number.

It is an amenable number.

303820 is an abundant number, since it is smaller than the sum of its proper divisors (392708).

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

303820 is a wasteful number, since it uses less digits than its factorization.

303820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1401 (or 1399 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 303820 is about 551.1986937575. The cubic root of 303820 is about 67.2262345603.

The spelling of 303820 in words is "three hundred three thousand, eight hundred twenty".