1002331220 has 48 divisors (see below), whose sum is σ = 2431332288. Its totient is φ = 343042560.

The previous prime is 1002331217. The next prime is 1002331249. The reversal of 1002331220 is 221332001.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1002331195 and 1002331204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130262 + ... + 137741.

It is an arithmetic number, because the mean of its divisors is an integer number (50652756).

Almost surely, 2^1002331220 is an apocalyptic number.

1002331220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1002331220 is an abundant number, since it is smaller than the sum of its proper divisors (1429001068).

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

1002331220 is a wasteful number, since it uses less digits than its factorization.

1002331220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268040 (or 268038 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1002331220 is about 31659.6149692317. The cubic root of 1002331220 is about 1000.7764702712.

Adding to 1002331220 its reverse (221332001), we get a palindrome (1223663221).

The spelling of 1002331220 in words is "one billion, two million, three hundred thirty-one thousand, two hundred twenty".