303642020 has 48 divisors (see below), whose sum is σ = 698217408. Its totient is φ = 110002560.

The previous prime is 303642019. The next prime is 303642029. The reversal of 303642020 is 20246303.

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 = 303641983 and 303642001.

It is not an unprimeable number, because it can be changed into a prime (303642029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59822 + ... + 64698.

It is an arithmetic number, because the mean of its divisors is an integer number (14546196).

Almost surely, 2^303642020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 303642020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (349108704).

303642020 is an abundant number, since it is smaller than the sum of its proper divisors (394575388).

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

303642020 is a wasteful number, since it uses less digits than its factorization.

303642020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5180 (or 5178 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 303642020 is about 17425.3269696726. The cubic root of 303642020 is about 672.1310478788.

Adding to 303642020 its reverse (20246303), we get a palindrome (323888323).

The spelling of 303642020 in words is "three hundred three million, six hundred forty-two thousand, twenty".