302021220 has 96 divisors (see below), whose sum is σ = 885620736. Its totient is φ = 76809600.

The previous prime is 302021183. The next prime is 302021273. The reversal of 302021220 is 22120203.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 302021196 and 302021205.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 130917 + ... + 133203.

It is an arithmetic number, because the mean of its divisors is an integer number (9225216).

Almost surely, 2^302021220 is an apocalyptic number.

302021220 is a gapful number since it is divisible by the number (30) 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 302021220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (442810368).

302021220 is an abundant number, since it is smaller than the sum of its proper divisors (583599516).

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

302021220 is a wasteful number, since it uses less digits than its factorization.

302021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2401 (or 2399 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 302021220 is about 17378.7577231516. The cubic root of 302021220 is about 670.9329988189.

Adding to 302021220 its reverse (22120203), we get a palindrome (324141423).

The spelling of 302021220 in words is "three hundred two million, twenty-one thousand, two hundred twenty".